A man heterozygous for black hair and brown eyes (both traits dominant ) has married a woman who is blue eyed and blond (both traits recessive). They plan to have 4 children. Make a drawing of one of the man's cells as it undergoes meiosis , and use this drawing to explain the following.
a. What type of gametes (sperm) can the man make?
b. What is the expected frequency of each class ( or type) of gametes?