Blonde hair (bb) is a recessive trait and brown hair (Bb) is dominant. If both parents have brown hair, what must be true if one of their children have blonde hair?

Question

A. Both parents must be hybrid with regard to hair color (Bb)

B. Both parents have two brown hair genes (BB)

C. One parent must have two blonde hair genes (bb) whole the other has two brown hair genes (BB)

D. One parent must have two genes for blonde hair (bb) and the other must be hybrid for hair color (Bb)

!Missing this part of my book please help!

Answer 1

http://www.khanacademy.org/science/biology

Scroll down to the sections on genetics and read everything carefully.