How blue eyes propagated as a recessive gene?

Question

I essence, if blue eyes are a recessive gene, how have they grown and subsisted over the years?

In: Biology

Answer 1

Recessive genes are just as likely to get passed on as dominant ones, they just don’t express (don’t manifest in the physical organism) if there’s a dominant one overriding them.

So, in addition to all the blue-eyes people you see walking around, there are millions and millions of other people carrying a recessive blue gene they can pass it to their kids.

It doesn’t take much, like an arbitrary beauty standard that says “blue eyes are prettier than not” to cause evolutionary pressure to favour blue too. As far as I know, there’s no meaningful survival benefit to eye colours but they certainly play a role in procreation.