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Doctor insights on: Can Blue Eyed Parents Have Brown Eyed Children

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Blue eyes on a kid with 2 brown eyed parents. How is this possible?

Blue eyes on a kid with 2 brown eyed parents. How is this possible?

Easy one: Brown gene dominates over blue so parents only need one of 2 genes to be brown.Blue eyed infants must get one blue gene from both parents, so in this case both parents carry one blue gene. Nothing spooky here, just basic genetics. ...Read more

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Is it possible to have brown eyed parents and grandparents, and yet have blue eyes yourself?

Is it possible to have brown eyed parents and grandparents, and yet have blue eyes yourself?

Blue requires 2: Dominent genes (a) require only one coded gene from a parent to express a color, while a recessive gene (a) requires a pair. At conception you get genes from both parents.Daddy brown eyes aa or aa donates one(a or a)& mommy brown eyes aa or aa donates the other. The baby could have aa, aa, or aa. If aa then eyes are blue.If you have blue eyes, your brown eyed parents were both aa(carriers of blue). ...Read more

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How can a child have blue eyes when both parents have dark brown eyes?

How can a child have blue eyes when both parents have dark brown eyes?

Brown dominant: Two brown eyed parents that produce a blue eyed child are both carriers of the blue eye recessive gene. Brown dominates. They both have bb for eye color. This means a 1/4 chance for blue, a 50% chance for bb carrier brown, a 25% chance for full bb brown. ...Read more

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Is it true that to produce a blue eyed baby, both parents must have blue eyes?

Is it true that to produce a blue eyed baby, both parents must have blue eyes?

No: Eye color has complex inheritance but brown vs blue is not too difficult. If the father is dark brown due to having both genes brown, then the child must get one brown from his dad and he will have brown eyes. If mom is true blue, she has both genes blue and her child will get only that color gene from her. If dad has one brown and one blue then 1/2 of his children will get blue eyes. ...Read more

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Is it unusual to have blue eyes if neither of your parents do?

Is it unusual to have blue eyes if neither of your parents do?

Not really: The genetics of eye color is complex but my understanding is that brown is dominant over blue which is recessive. Each parent contributes one copy of one of a pair of genes. If both parents have brown+blue gene they will have brown eyes but each may pass on the blue gene to the infant resulting in expression of blue eyes. One brown gene dominates and produces brown eyes in most cases. ...Read more

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Can a baby get blue eyes if the parent wears blue contacts?

Can a baby get blue eyes if the parent wears blue contacts?

No.: The color of a parent's contacts does not, in any way, affect the eye color of their child. Inheritance of eye color is complex and determined by the parents' genetics, that is, their natural eye color. ...Read more

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