1. Define homozygous and heterozygous. 2. What is the purpose of a pedigree? 3. Explain why teratogens are difficult to identify. 4. Explain why a woman carrying the gene for hemophilia can produce...

1. Define homozygous and heterozygous.

2. What is the purpose of a pedigree?

3. Explain why teratogens are difficult to identify.

4. Explain why a woman carrying the gene for hemophilia can produce two hemophiliac sons when she is mated to a normal male.

5. Under what conditions does a female acquire an X-linked recessive disorder?