Q1. While hairless hamsters are mated with normal- haired hamsters, about 1/2 the offspring are hairless and one-half are normal. When hairless hamsters are crossed with each other, the ratio of hairless to normal-haired is 1:2. How do you account for the results of the first cross? How would you describe the unusual ratio obtained in the second cross?

Q2. A man and woman are both of normal pigmentation and have a one child out of three who is albino (without melanin pigmentation). Albinism is an autosomal (not sex-linked) recessive trait. What are the genotypes of albino’s parents?