White forelock of hair is due to a dominant gene (W). A mom with a white forelock and a dad who does NOT have a white forelock, have a child without a white forelock.
These parents are about to have a second child. What are the chances that their second
child HAS a white forelock?

So the mom has the genes of Ww because for the first kid not to get it she must have a recessive gene. The Father for sure has 2 recessive genes, ww, meaning the kid has a 50/50 chance. The kid could get Ww or ww.

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