If blue eyes are a recessive gene and green eyes are a dominant gene, why are there more people with blue eyes?

Question

If blue eyes are a recessive gene and green eyes are a dominant gene, why are there more people with blue eyes?

In: 151

Answer 1

Eye colors are a bit more complicated than just a single gene that decides it, but even in this simplification it can be explained as such:

A gene being dominant doesn’t make it more likely to be passed on, and some genes are simply more prevalent (less rare) than others. This can lead to the situation where bb is more common than any combination of genes that makes your green eyes express.