Eli5: why do woman get less of some mutation like color blindness?

Question

If one X chromosome is healthy and one is mutated, why does the healthy take control?

In: 8

Answer 1

XX women have two pots of paint to use. If one is red and one is blue, they don’t still get red. They need both pots to be red to paint in red. XY men only have one pot of paint, so their paint is whatever they’re given.