How can a child have a trait such as eye color that neither parent has?

The chromosomes a child inherits carry genetic information that determines eye color. Differences in the copies received from each parent causes variations in the amount of melanin produced. A region on chromosome 15 has a big part in determining eye color. The OCA2 and HERC2 genes are located in this region.

Can you have a different eye color than your parents?

Children can have completely different eye colors than either of their parents. But if both parents have brown eyes, it’s most likely that their children also will have brown eyes. The darker colors tend to dominate, so brown tends to win out over green, and green tends to win out over blue.

Can a child have blue eyes if parents don t?

If both of you have brown eyes, then there is generally a 25% chance that the baby will have blue eyes if both of you carry the recessive blue-eye gene. But if only one of you has a recessive blue-eye gene, and the other has two brown, dominant genes, then there is a less than 1% chance of the baby having blue eyes.

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Can a brown eyed father and a blue eyed mother have a blue eyed child?

So, to try and clarify things, let’s think about this situation. Someone with brown eyes may be carrying one blue allele and one brown allele, so a brown-eyed mother and a blue-eyed father could give birth to a blue-eyed child. Now mix in a third green allele, which is dominant to blue, but recessive to brown.

What is the dominant gene for eye color?

Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. Today, scientists have discovered that at least eight genes influence the final color of eyes. The genes control the amount of melanin inside specialized cells of the iris.

What is the rarest color of eye?

Green eyes are the rarest color. Brown eyes are the most common. People can also have blue eyes, (Learn More) gray eyes, (Learn More) or hazel eyes.

Can 2 brown haired parents have a blonde child?

However, if the brunette does not carry the recessive blonde trait, the baby will have brown hair. If both parents are brunette, they can only have a blonde child if they both carry the recessive blonde trait. But even if they do, the chance of giving birth to a blonde is just one in four.

Can 2 blue eyes make a brown?

Eye color is not an example of a simple genetic trait, and blue eyes are not determined by a recessive allele at one gene. Instead, eye color is determined by variation at several different genes and the interactions between them, and this makes it possible for two blue-eyed parents to have brown-eyed children.

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Can parents with blue eyes have a brown eyed child?

Someone with broken OCA2 genes will have blue eyes no matter what the HERC2 genes are. … Because the two genes depend on each other, it is possible for someone to actually be a carrier of a dominant trait like brown eyes. And if two blue eyed parents are carriers, then they can have a brown eyed child.

What nationality has hazel eyes?

The way light scatters in hazel irises is a result of Rayleigh scattering, the same optical phenomenon that causes the sky to appear blue. Anyone can be born with hazel eyes, but it’s most common in people of Brazilian, Middle Eastern, North African, or Spanish descent.

Do all babies have blue eyes?

Well, because all babies are born with blue eyes, right? Wrong. Feast your baby blues upon this fun fact: Worldwide, more newborns have brown eyes than blue. And while it’s true that many babies have blue or gray eyes at first, it’s important to know that eye color can change for months after birth.

What’s the most common color of eyes?

Today, brown is the most common eye color worldwide. Scientists think that long ago when everyone lived in hot climates where it was sunny year-round everyone had brown eyes. Dark irises may have protected their eyes from being damaged by ultraviolet radiation and bright sunlight.

How do you get green eyes?

Green eyes are a genetic mutation that produces low levels of melanin, but more than blue eyes. … Instead, because of the lack of melanin in the iris, more light scatters out, which make the eyes appear green. Changes in light make lighter eyes look like they are changing colors like a chameleon.

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Who has stronger genes mother or father?

Genes from your father are more dominant than those inherited from your mother, new research has shown.

What genes are inherited from father only?

From their mother, a baby always receives the X-chromosome and from father either an X-chromosome (which means it will be a girl) or a Y-chromosome (which means it will be a boy). If a man has a lot of brothers in his family, he will have more sons and if he has a lot of sisters, he will have more daughters.

What does your eye color mean?

The color of your eyes depends on how much of the pigment melanin you have in your iris—the colored part of your eyes. The more pigment you have, the darker your eyes will be. Blue, grey, and green eyes are lighter because they have less melanin in the iris. Most people in the world will end up with brown eyes.

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