1) A color- blind woman marries a man with the normal color vision.  They have ten children, six boys and four girls. 

a) How many have normal vision?

b) How many are color- blind?

2) A light haired man has blood type O, his wife has dark hair and blood type AB, and however her father had light hair.  Suppose the dark hair is dominant to light.

a) What is the probability they will have a child with the dark hair and blood type A?

b) Explain the probability they will have a child with light hair and blood type B?

c) Explain the total number of the phenotypes their children could show?