Why do twins look different?

Why do twins look alike? // Identical twins // Fraternal twins // Do fraternal twins look alike??

Best Answer

Yes! Identical twins came from the same sperm and egg, so they have the same chromosomes and genes.

As identical twins get older they may look more and more different, because they are exposed to more diverse environments.

The science of epigenetics explains how these environmental influences can affect the genes.

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Related Questions

Why do dogs look different?

Dogs are diverse. They come in all different colors, shapes and sizes. Humans have had a large influence on dog DNA too since dogs were domesticated and bred by humans to look the way they do. For instance, humans bred Chihuahuas with other Chihuahuas for a very long time.

Why Do Some pit bulls look different?

Let's focus on American pit bull terriers initially. The reason pit bulls vary so much in their looks is that they were initially bred for their dog fighting ability rather than trying to breed to a standard. Dogs that showed aggression towards people were not used for breeding and were known as "junkyard dogs".

Why do pit bulls look different?

The reason pit bulls vary so much in their looks is that they were initially bred for their dog fighting ability rather than trying to breed to a standard. Pit bulls are naturally aggressive towards other dogs, but not at all towards people.

Why These Identical Twins Are No Longer Identical

Why do my dogs eyes look different?

Cataracts are often confused with a normal aging change that affects a dog's lenses called lenticular sclerosis. Both conditions give the pupils (the normally black center to the eye) a white, grey, or milky appearance, but a veterinarian can tell the difference through a standard eye exam.

Why do kittens look so different?

Why can kittens of the same litter look so different? This is because felines are a stimulated ovulation species & in order to give their genes the best chance of survival, females in season may mate with more than one tomcat to vary the gene pool of their litter.

Why do CC and rainbow look different?

CC, as in Copy Cat, has the same DNA blueprint as her genetic mother, Rainbow. So, like identical twins they share the same genetic code. That means everything's the same—their looks, their mannerisms, their…. “We were called upon because we have a large genetic database on the domestic cat.”

Why do cat litters all look different?

Why can kittens of the same litter look so different? This is because felines are a stimulated ovulation species & in order to give their genes the best chance of survival, females in season may mate with more than one tomcat to vary the gene pool of their litter.

Why do dog breeds look so different?

While there are lots of different cat breeds within the domestic cat species, most of them look alike. Humans realized just how much of a useful companion a dog could be, so dogs began to be bred for specific purposes. This is when we started getting dogs for herding, dogs for hunting, dogs for sporting, and more.

Beyond genetics: what makes identical twins different?

Why do pit bulls look so different?

The reason pit bulls vary so much in their looks is that they were initially bred for their dog fighting ability rather than trying to breed to a standard. Dogs that showed aggression towards people were not used for breeding and were known as "junkyard dogs".

Why do belly buttons look different?

Your belly button! Whether you end up with an innie or an outie is usually a matter of chance. Most people end up with innies, but some people have outies. Outies usually occur when more of the umbilical cord is left when it's cut, leading to more skin left over once it dries out.

Can twins have different birthdays?

Twins are defined as children produced in the same pregnancy. Usually they are delivered only a few minutes or hours apart. But they can have different birthdays. Twins have been born days and even weeks apart!

Can twins be different races?

In such cases, fraternal twins can differ from each other quite dramatically in terms of skin color or other physical characteristics. Numerous sets of mixed twins have been born. Much more rarely, mixed twins can arise as a result of heteropaternal superfecundation.

Can twins have different fathers?

Homopaternal superfecundation refers to the fertilization of two separate ova from the same father, leading to fraternal twins. Superfecundation, while rare, can occur through either separate occurrences of sexual intercourse or through artificial insemination.

Identical Twins Who Look Nothing Alike

Can humans have twins with different fathers?

Homopaternal superfecundation refers to the fertilization of two separate ova from the same father, leading to fraternal twins. Superfecundation, while rare, can occur through either separate occurrences of sexual intercourse or through artificial insemination.

Why do dogs look so different from one another?

Dogs began to be bred for specific purposes that relied on their appearance, agility, size, form, and more. Since cats weren't being used for versatile jobs, they were never bred to look too different from one another. Part of the reason we love pups so much is because they can all look so different!

Why do dogs look so different from wolves?

Despite being related, wolves and dogs are quite different and that 0.2% difference can make quite an impact in both appearance and behavior. Compared to wolves, dogs have smaller skulls, smaller teeth and weaker jaws. While all wolves look pretty much the same, dogs come in many different shapes, sizes and colors.

Why do puppies from the same litter look different?

However it can occur in dogs because females produce a number of ova (eggs) at the same time, which is why they have litters of pups rather than one at a time. So if Mommy is a party girl, her pups might look quite different from each other because, although they came from the same litter, they had different Daddies.

Can dogs tell the difference between twins?

Yes, a dog can smell the difference between identical twins. Identical twins are not completely the same, and they also have different smells. Also a study found that trained scent dogs could tell identical twins apart.

Do male and female dogs look different?

Not all male dogs are bigger than all female dogs of course, but on average the male puppies in a purebred litter will grow slightly taller and heavier than the females in the same litter. But males also have a different 'look'. They look, unsurprisingly, more masculine.

Can a woman have twins with 2 different fathers?

Superfecundation is the fertilization of two or more ova from the same cycle by sperm from separate acts of sexual intercourse, which can lead to twin babies from two separate biological fathers. The term superfecundation is derived from fecund, meaning the ability to produce offspring.

Can a dog tell the difference between twins?

Yes, a dog can smell the difference between identical twins. Identical twins are not completely the same, and they also have different smells. So yes, the scents of the two different people would be enough. Also a study found that trained scent dogs could tell identical twins apart.

Why do twins have identical characteristics?

Because identical twins develop from a single fertilized egg, they have the same genome. So any differences between twins are due to their environments, not genetics. Recent studies have shown that many environmentally induced differences are reflected in the epigenome.

Why twins are born early?

Triplets and other higher order multiples have an even greater chance of being born early. In some cases, the onset of preterm labor cannot be halted, while in other situations, risks to the mother or babies require an early conclusion to the pregnancy. Here are some of the most common reasons why twins are born early.

Do twins have a higher chance of having twins?

However, if you have fraternal twins (non-identical) in your family, your chances of conceiving twins rise. A history of fraternal twins on the female side of the family indicates a higher likelihood of ovulating more than one egg per cycle.

Why do Pugs look sad?

Why so sad? Because the Pug nose has been bread into its face, they can often get eye injuries because of the lack of forward protection. As a result of their breeding, they also have restricted smaller passages to breath through which is why you will often hear them panting and wheezing.

Why do dogs look up?

Dog owners will assert that dogs can clearly look upwards, as they often gaze up towards their owners. When lying down, though, the level of head-tilting a dog can perform increases, which is why a dog may often lie down to observe an overhead bird or other elevated object.

Why do I keep getting pregnant with twins?

Studies have shown that women who are over 35 years have higher chances of getting pregnant with non-identical twins. This is likely because woman's ovaries start releasing more than one egg each month,. Another cause is that older women had higher levels of a hormone called FSH (follicle-stimulating hormone).

Why do dogs look sad?

It's common to misinterpret dogs' signals and think that they mean something that they don't. It's when a dog is calm that it's harder to tell if the emotional state is sad or content. A dog who is lying down with its head on its paws will have a closed mouth, which always makes a dog look less happy.

Why do dogs look cute?

Research by the University of Portsmouth demonstrated that dogs raise their inner brows to make their eyes appear larger. Despite the reasons why dogs smile, tilt their heads, and look up at us with sweet puppy dog eyes, loving pet owners will always think they are cute.

Why do dogs look away?

New research suggests that man's best friend may have evolved to handle angry owners – by looking away. Facial expression was found to alter dogs' viewing behavior, such that they tend to avoid angry humans' gaze even if they can look at equally upset canines longer.

Why do babies look cute?

It's their eyes, which are huge relative to their faces (eyeballs don't grow all that much after birth); their heads, which are too big for their bodies; their cheeks; and their tiny chins that get adults to fixate on them. Scientists say these traits activate an instinctual attention in adults.

Why do dogs look guilty?

We often assume that our dogs feel guilty because of the way they act when we catch them doing something they're not supposed to do. This guilty look — which we are all familiar with from various Internet memes — is frequently perceived as a canine acknowledgement of wrongdoing or as an expression of remorse.

Do twins deliver early?

If you're carrying more than one baby, chances are good you'll deliver early. Twins are usually born around 36 weeks -- four weeks early. Triplets arrive at about 33 weeks, and quads often make their debut at 31 weeks.

Why do dogs look away when you look at them?

People who are shy or intimidated by someone direct their eyes away from a more dominant personality. Dogs that are timid, fearful, dominant, friendly or aggressive view eye contact in the same way, and react to the eyes like we do. To a dog, a stare from another dog, animal or human is rude and can mean a challenge.

Do penguins ever have twins?

Penguins normally have just one chick per breeding cycle, but two lucky penguin parents have had twins at Sunasia Sea World in northeast China's Dalian.

Do twins drop before Labor?

Feeling your baby dropping, settling or lightening commonly happens two to four weeks before labor starts in a first-time mom. Your baby also may not drop if he is very big, if there are twins in there, or if he is breech. Also, your baby does not need to drop for labor to start.

Can puppies from the same litter look different?

However it can occur in dogs because females produce a number of ova (eggs) at the same time, which is why they have litters of pups rather than one at a time. So if Mommy is a party girl, her pups might look quite different from each other because, although they came from the same litter, they had different Daddies.

Do all mammals have twins?

Whenever an animal gives birth to multiple young, the offspring are fraternal twins. Well, if not twins then fraternal triplets, quadruplets or quintuplets. Different animals have different size litters. Primates, like humans, rarely have more than one baby at a time.

Do twins smell the same?

The answer is yes. Identical twins do have different scent even if they live in the same home, use the same personal products and eat the same foods. However, the body odor of identical twins is significantly more similar than fraternal twins and singletons.

Do twins skip a generation?

The notion that twins always skip a generation is also a myth. The illusion may have arisen because men who inherit the gene from their mothers are unaffected by it ( they do not ovulate), but can still pass it on to their daughters, who, in turn, will have an increased likelihood of conceiving twins.

Why do dog breeds have different personalities?

Dog breeds really do have distinct personalities—and they're rooted in DNA. Now, in the most comprehensive study of its kind to date, scientists have shown that such distinct breed traits are actually rooted in a dog's genes. The findings may shed light on human behaviors as well.

Why do dogs have different colored fur?

This is because the Eumelanin pigment is the default coloration for most dogs! A secondary pigment called Phaeomelanin is also an important determinant of a dog's fur. Unlike the way that Eumelanin also affects the coloration of a dog's nose and eyes, Phaeomelanin only affects their coat color.

Why do dogs see differently than humans?

Dogs see a lot better than humans do at night. Dogs have many adaptations for low-light vision. A larger pupil lets in more light. The center of the retina has more of the light-sensitive cells (rods), which work better in dim light than the color-detecting cones.

Why do Huskies have different Coloured eyes?

Heterochromia is caused due to uneven melanin distribution and inbreeding. It occurs in many other breeds of dogs (Australian Shepherd would probably be right behind the Husky), cats, and horses. However, sometimes, melanin isn't evenly distributed between the two irises, causing the difference in color.

Why do dogs look like owners?

Dog owners look like their dogs. Or so people say. An experiment Nakajima conducted in 2009 showed that people were, at a rate significantly higher than chance, able to match dogs and their owners simply by looking at photographs of their faces. His findings were similar, he says, to those of previous studies.

Why do Pugs look so sad?

Why so sad? Because the Pug nose has been bread into its face, they can often get eye injuries because of the lack of forward protection. As a result of their breeding, they also have restricted smaller passages to breath through which is why you will often hear them panting and wheezing.

Why do my dogs eyes look weird?

This easy-to-spy problem is common in both cats and dogs and can be caused by an injury, an irritation or even a disease. Regardless of the cause, your pet's eye may look roughly the same: Some or all of the structures surrounding the eye will be red and/or visibly swollen, a condition commonly known as conjunctivitis.

Why do my dogs gums look black?

Healthy gums should be bubble gum-pink in color. Some dogs, especially those of certain breeds, such as the chow chow, have black coloring in their mouths. This is normal pigmentation for some dogs. It is the result of microscopic melanin granule deposits, and it is not something to be concerned about.

Why do Malamutes look like wolves?

Malamutes share many traits with wolves because they are dogs - and more so because they are a natural breed. Other breeds are not nearly as 'pack' oriented as a Malamute is. Like the wolf, the Malamute shares a strong bond with his pack.

Why do Walnuts look like brains?

Walnuts: Walnuts look like little brains because they have folds and divided halves. The nutrition in walnuts helps your brain grow and function. Carrots: A sliced carrot looks like the human eye. Science shows that the Vitamin A in carrots improves eye function.

Why do dogs look at you?

Let's face it: Dogs love their owners, but when they stare expectantly, it's not usually because they're trapped in a reverie of devotion. Rather, it's because they're thinking they might get something. Some dogs may just be trying to read an emotion in our human facial expressions.

Why do my dogs nails look bloody?

With bacterial infections, the most common cause is trauma, so it's important to keep those nails clean and dry after sustaining an injury. When fungal infections of the nail are caused by malassezia, affected dogs will show a brown-red discoloration of the nail with a waxy brown-red seepage.

Why do dogs keep looking at you?

Let's face it: Dogs love their owners, but when they stare expectantly, it's not usually because they're trapped in a reverie of devotion. Rather, it's because they're thinking they might get something. Before you try it, be aware that staring directly into a dog's eyes can be considered a direct challenge.

Why do dogs look into your eyes?

The Real Reason Your Dog Is Staring Into Your Eyes. Sometimes you glance up and your dog is staring intently into your eyes. Studies indicate that canine species communicate with each other by gazing. Dogs specifically seemed to have evolved to look at humans' faces even more than socialized wolf counterparts.

Why do animals have different digestive systems?

This difference occurs because of the various types of digestive systems found in animals. There are four basic types of digestive systems: monogastric, avian, rumi- nant, and pseudo-ruminant. A monogastric digestive system has one simple stomach.

Why do puppies come out different colors?

Each of the pigments, eumelanin and phaeomelanin, has a "default" color that can be modified by various genes. Eumelanin is, by default, black pigment but variation in color occurs because genes modify eumelanin to create other colors such as liver(brown), blue (grey), or isabella (pale brown).

Why do dogs have different colored nails?

Unlike cats, dogs do not have retractile claws. The color of the nail is determined by the color of the surrounding skin and hair. This dog has black claws on the brown paw and a mixture of white and black claws on the white paw. Some breeds of dogs such as the St. Bernard have 2 sets of dew claws on the rear feet.

Why do Huskies have different color eyes?

Why do huskies sometimes have different colored eyes? It so happens that many puppies have pale blue eyes when they're born, and color starts to slowly appear over age. However, sometimes, melanin isn't evenly distributed between the two irises, causing the difference in color.

Why do puppies need different food?

Do puppies and adult dogs have different nutritional needs? It's less about the content of the food, and more about the amount. Puppies will need more protein, fat and micronutrients than adult dogs, Patton says, because they need to gain weight. But that can be accomplished by increasing the volume of the food.

Why do puppies smell different than dogs?

"Their breath has that sweet mother's milk smell because their mouths are clean and haven't yet developed any bacteria or plaque, which typically causes odors." He adds that some people may not experience this sweet smell because of their puppy's health or particular habits.

Why do vets look at dogs gums?

Dogs should always have pink or light red gums; this is one way to signify adequate blood flow and overall health. White gums in dogs can signify anemia. Anemia refers to the reduction of red blood cells or hemoglobin that are circulating in your dog's body.

Why do my dogs eyes look blue?

Nuclear sclerosis, also called lenticular sclerosis, can cause the pupils of your dog's eyes to take on a cloudy bluish-gray appearance. The condition is also seen in humans and horses. This condition is a normal change to the lenses of the eyes that typically occurs in dogs over the age of six.

Why do my dogs balls look swollen?

Testicular swelling occurs in male dogs with no preference to any specific breed. Epididymitis is most often found in adult-aged dogs. While there are several possible causes associated with testicular swelling, the most common cause for testicular swelling is trauma from an injury to the scrotal area.

Why do Down's syndrome look the same?

The DNA in our chromosomes determines how we develop. Down syndrome is caused when there is an extra chromosome. People with Down syndrome have 47 chromosomes in their cells instead of 46. They have an extra chromosome 21, which is why Down syndrome is also sometimes known as trisomy 21.

Why do bears and dogs look alike?

No, but they DO look alike, don't they? Baby bears in particular. Both are members of the suborder Caniformia, which includes dogs, wolves, weasels, seals, and bears. They all share a common ancestor somewhere way back in their genes, but diverged around 47 million years ago.

Why do dogs look so guilty?

We often assume that our dogs feel guilty because of the way they act when we catch them doing something they're not supposed to do. This guilty look — which we are all familiar with from various Internet memes — is frequently perceived as a canine acknowledgement of wrongdoing or as an expression of remorse.

Why do my dogs nipples look bruised?

It is common to see when a dog goes into their first heat. The vulva and mammary tissue will swell preparing for conception. Sometimes this can cause bruising in sensitive dogs. If it starts to cause her problems or gets worse take her to the vet.

Why do German shepherds look like wolves?

The goal was to create a dog that resembles a wolf with a higher trainability like a 'regular' dog. This breed originates from German Shepherd Dogs, Siberian Huskies, and various Inuit breeds. Like wolfdogs, they can be destructive and be prone to separation anxiety. They also can be stubborn.

Why do my dogs eyes look black?

Black eyes are essentially just bruises caused by impact to the nose or eye area. Once the blood vessels in the face rupture, blood begins to pool under the skin. This pooling is visible through the skin, causing darkened coloration. Black eyes on dogs are less obvious because they are difficult to see.

Why do my dog's eyes look cloudy?

Nuclear sclerosis, also called lenticular sclerosis, can cause the pupils of your dog's eyes to take on a cloudy bluish-gray appearance. The condition is also seen in humans and horses. This condition is a normal change to the lenses of the eyes that typically occurs in dogs over the age of six.

Can I have twins if my great grandmother had twins?

If the twins are present on your husband's/partner's side, it won't influence your chances of having twins. Remember, the gene for hyperovulation is only a factor for the mother. If your mother (or your grandmother or aunt) was or had fraternal twins, you might have the gene.

Why do dogs look away when guilty?

Your dog might look guilty after he's done something wrong, but he's probably just reacting to your response. We often assume that our dogs feel guilty because of the way they act when we catch them doing something they're not supposed to do. But in reality, your dog's guilty look means something vastly different.

Why do dogs look like bears?

Let's face it: some dogs don't look much like bears, but there are some dogs breeds that are more bear-like than others. Some dogs look like black bears, others look like brown bears and a few others look like polar bears. Many dogs dislike being hugged, and hugging an unknown dog may lead to serious injury!

Why do Dingoes look like dogs?

Dingoes might look like your run-of-the-mill mongrel pooch, and for years, researchers assumed the dingo's ancestors were domesticated dogs from East Asia that subsequently went wild. But it turns out that dingoes are more unique than that. At that time, they were called Canis dingo.

Why do my gums look white?

Poor dental hygiene is the most common cause of gingivitis. People with gingivitis may experience irritated, red, and swollen gums around the base of their teeth. They may also notice loose teeth or bleeding when brushing and flossing. Over time, the condition can cause the gums to turn white and recede.

Why do my dogs eyes look cloudy?

Nuclear sclerosis, also called lenticular sclerosis, can cause the pupils of your dog's eyes to take on a cloudy bluish-gray appearance. The condition is also seen in humans and horses. This condition is a normal change to the lenses of the eyes that typically occurs in dogs over the age of six.

Why do dogs always look sad?

It's common to misinterpret dogs' signals and think that they mean something that they don't. It's when a dog is calm that it's harder to tell if the emotional state is sad or content. A dog who is lying down with its head on its paws will have a closed mouth, which always makes a dog look less happy.

Why do my dogs pupils look red?

The colors of a dog's eyeshine aren't limited to red and green, either. The specific color reflected depends on the amount of zinc or riboflavin in the eye cells. Red glowing eyes at night are the result of blood vessels reflecting light. This is common with white dogs who have blue eyes.

Why do dogs look at their owners?

Let's face it: Dogs love their owners, but when they stare expectantly, it's not usually because they're trapped in a reverie of devotion. Rather, it's because they're thinking they might get something. Before you try it, be aware that staring directly into a dog's eyes can be considered a direct challenge.

Why do some dogs look like bears?

Let's face it: some dogs don't look much like bears, but there are some dogs breeds that are more bear-like than others. Some dogs look like black bears, others look like brown bears and a few others look like polar bears. Many dogs dislike being hugged, and hugging an unknown dog may lead to serious injury!

Why do puppies look so sad?

It's common to misinterpret dogs' signals and think that they mean something that they don't. It's when a dog is calm that it's harder to tell if the emotional state is sad or content. A dog who is lying down with its head on its paws will have a closed mouth, which always makes a dog look less happy.

Why do dogs look at the sun?

The History of Eye Sensitivity in Dogs. Dogs' eyes are sensitive just like peoples' eyes, and often, they're from the same causes. Dogs aren't likely to just blatantly stare at the sun (they have instincts, after all), but they also won't understand that staring at the sun causes eye damage.

Why do bears look like dogs?

They were not specifically in the bear's or dog's scientific families, but they are classified in the Caniformia, or "dog-like" suborder. Modern animals in the Caniformia suborder include wolves, foxes, dogs, bears, sea lions and weasels. This makes bear dogs something like cousins to their namesakes.

Why do dogs tails look bent?

Signs of a broken tail include swelling, bending, a kink in the tail, the tail seeming painful and a dog having difficulty moving or wagging its tail. Limber tail syndrome, or limp tail syndrome, is something different from a broken tail. Because of this, it is sometimes called cold water tail.

Why do puppies look so cute?

The reason why babies and puppies are cute has been revealed by Oxford University researchers who say they evolved that way to survive. Characteristics like big eyes, chubby cheeks and giggling in infants are all designed to encourage others to look after them.

Why do babies look so cute?

What is it about babies that makes them so cute? It's their eyes, which are huge relative to their faces (eyeballs don't grow all that much after birth); their heads, which are too big for their bodies; their cheeks; and their tiny chins that get adults to fixate on them.

Why do dogs always look happy?

Many experts believe that dogs have learned to smile because they've seen humans do the same or because we reward them for doing so, Stilwell said. At any rate, it usually means your dog is contented and happy.

Why do my dogs eyes look funny?

Cataracts block light from reaching the back of the eye resulting in poor vision or blindness, depending on their severity. Cataracts are often confused with a normal aging change that affects a dog's lenses called lenticular sclerosis.

Why do my dogs eyes look sunken?

Horner's syndrome is due to a dysfunction of the sympathetic nerves of the eyes and surrounding facial muscles. Other causes for an elevated or protruding third eyelid gland include: tetanus, facial nerve paralysis, facial muscle atrophy, and dehydration.

Why do hippos always look wet?

Hippos have unique skin that needs to be kept wet for a good part of the day. Staying out of the water for too long can lead to dehydration, so hippos try to remain in water during the day. The blood sweat creates a layer of mucous that protects hippo skin from sunburn and keeps it moist.

Why do Huskies look like wolves?

Fur between the toes helps huskies grip the ice and stay warm. Interestingly enough, although huskies look very much like some types of wolf, they share less DNA with old-world wolves than the Shiba Inu and Chow Chow--the two dogs with the closest biological relation to their ancestors.

Why do dogs have a guilty look?

Your dog might look guilty after he's done something wrong, but he's probably just reacting to your response. We often assume that our dogs feel guilty because of the way they act when we catch them doing something they're not supposed to do. But in reality, your dog's guilty look means something vastly different.

Why do my dogs eyes look red?

This easy-to-spy problem is common in both cats and dogs and can be caused by an injury, an irritation or even a disease. Regardless of the cause, your pet's eye may look roughly the same: Some or all of the structures surrounding the eye will be red and/or visibly swollen, a condition commonly known as conjunctivitis.

How do parents tell identical twins apart?

Telling twins apart is actually one fear that can be taken off the list. Most parents find that mixing up their babies is the least of their concerns. After only a few hours or days at most, they are distinguishable as individuals. Even if they look alike, parents just know the difference.

Do twin kittens share a placenta?

Stage three is the passage of the cat placentas and this will usually happen after each kitten arrives. Count the number of placentas your cat passes – there should be one placenta for every kitten. If you notice there are less placentas than there are kittens, mum could have eaten them, or twins may have shared one.

Do twins have the same fingerprint?

No! Studies have concluded that, even though the fingerprints of identical (MZ) twins may be very similar, they are not identical. MZ twins share the same genetic makeup (DNA) because they are formed from a single zygote (fertilized egg). However, fingerprints are not an entirely genetic characteristic.

Do twins ever go full term?

Doctors consider 37 weeks to be full-term for most twin pregnancies. The average length of pregnancy for twins is 36.4 weeks. Babies who are born between 32 weeks and 37 weeks generally do very well. This is because monochorionic twins are more likely to experience complications.

What are the odds of twins having twins?

Chances of Having Identical Twins. In the general population, identical twin pregnancies occur 0.45 percent of the time, or 1 in 250 births. While most multiple pregnancies conceived with fertility treatments are fraternal twins, the use of fertility treatment does increase your risk of having identical twins.

Do identical twins have the same DNA?

The Claim: Identical Twins Have Identical DNA. It is a basic tenet of human biology, taught in grade schools everywhere: Identical twins come from the same fertilized egg and, thus, share identical genetic profiles. But according to new research, though identical twins share very similar genes, identical they are not.

How do you potty train twins?

Tips on potty training twins: Go naked (or bottomless). Two kids wetting their pants all day makes for a lot of laundry. Bring in reinforcements. Hire a babysitter or recruit your mom or a pal or your partner to help prevent accidents before they happen.