Hello all, I was wondering how DNA works for eyes colors (recessive/dominant genes).
I’m an Asian mom (brown eyes) and my husband is Caucasian (brown eyes). Both our parents have brown eyes as well.
My first kid has brown eyes but my second has blue eyes. My husband’s maternal grandpa had blue eyes (would that explain the source of my second kid’s blue eyes ?).
Thanks for the explanation!
In: Biology
Approximately 15 genes can be involved in determining eye colour – some will regulate the overall production of melanin, some will affect the distribution, some will determine the structure of the iris, some what parts of the iris will reflect light, some when melanin production will kick in, and how etc etc etc. Some of these genes exhibit dominant traits, some do not. So you can carry a variation in any one of those genes, which will affect the probability of an outcome, but it’s not a 1-1 (or 2-1) straightforward outcome. Btw, many children, especially Caucasian ones, are born with blue eyes and keep them for anywhere between few months to a couple of years in childhood; I’m brown-haired and brown-eyed and was strawberry blond and blue-eyed until about 4-5 years of age.
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