![]() One more thing, the brown version of BEY2 is dominant over the green version of GEY, which is dominant over the blue versions of both genes. It comes in two forms, a green ( G) and a blue ( b) one. This is because there is a 2nd gene, a green-blue gene ( GEY) that is involved as well. We can't rule out that they'll have green eyes, though. Your kids have a 50-50 shot of not having brown eyes. ![]() So what does this mean for your children? It means that you will always pass a blue eye version ( b) and that your husband will pass one onto his kids half the time. In other words, he is Bb - a brown-eyed carrier of blue eyes. However, because his mom has blue eyes, we know he got a b from her. And we know your husband has at least one B since he has brown eyes.īut what about the other copy of his brown-blue gene? It is often hard to figure out if someone is a blue eye carrier. OK, so we know you are for sure bb (both copies are blue) that is the only way to get blue eyes. Brown is dominant over blue which means if either or both of your copies of this gene are B, then you have brown eyes (remember, we have two copies of most of our genes - one from mom and one from dad). It comes in two forms, a brown ( B) and a blue one ( b). The first gene is the brown-blue gene, BEY 2. These chances are based on an eye color model where two genes determine eye color. ![]() Eye colorĪs I said earlier, your chances for a child with blue or green eyes are around 50%. If he isn't a carrier, then chances are pretty close to zero for a blue-eyed child with red hair. So, if your husband is a carrier for red hair, then your chances for a redhead with blue or green eyes is 1 in 4 (we separate out the two below). If he doesn't, then the chances are close to zero. If he does, then there is most likely a 50-50 shot for a redhead. The chances for red hair depend entirely on whether or not your husband carries a hidden red hair gene. The chances for green or blue eyes are around 50%. That makes it difficult to give accurate predictions for what coloring a child might have. However, as the article below correctly points out, there are actually many genes that affect human pigmentation traits. Editor’s note (): The predictions in this article are based on simple genetic models, such as a two-gene model for eye color and a single gene for red hair.
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