When a light skinned person and a dark skinned person have a child, that child is likely to have a mix of those skin tones, resulting in a caramel hue. However, when someone with blond hair and someone with black hair have a child, the child would either have blond or black hair rather than a mix of the two producing brown.
And where do eye colour genes fall in here?
In: Biology
Genes themselves don’t mix. Other than the genes on sex chromosomes, chromosomes come in pairs, where one comes from each parent, and when you have children, they get half of your and half from the other parent.
For a few specific traits, there is a single gene or very small number that cause that trait to be expressed. For a lot of traits, though, it is the combination of lots of genes together that result in the trait. For the second sort, you will get a mix from each parent, and are likely to have something of a blend.
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