1. FOR ALL QUESTIONS – THESE ANSWERS APPLY A – 25% B – 50% C – 75% D – 100%

2. In dogs, there is a hereditary type of deafness caused by a recessive gene. Two dogs who carry the gene for deafness but have normal hearing are mated. What is the percent chance for having a puppy who has normal hearing?

3. In cabbage butterflies, White wings are dominant to yellow wings. If a heterozygous butterfly is crossed with a homozygous recessive butterfly, what is the chance they have offspring with yellow wings?

4. In guinea pigs, short hair is dominant over long hair. If a short haired homozygous dominant guinea pig is crossed with a long haired homozygous recessive guinea pig, what is the chance they have offspring that are heterozygous?

5. Can you curl your tongue up on the sides? Tongue-curling in humans is a dominant genetic trait. Suppose a man who is heterozygous for tongue-curling marries a woman who is also heterozygous for this trait. What is the chance they have a child who cannot curl their tongue?

6. In guinea pigs, rough coats (with lots of swirly cowlicks) are dominant over smooth coats. If an homozygous dominant guinea pig is crossed with a heterozygous guinea pig, what are the chance they have offspring with a rough coat?

7. In pea plants purple is dominant to white. If you cross two plants – both heterozygous for color – what is the percent chance that they have offspring who are white?

8. In pea plants purple is dominant to white. If you have two parents, one is homozygous recessive and the other is homozygous dominant. How many of the offspring will be purple?

9. In pea plants – tall is dominant to short. If you have two parents – one heterozygous and the other is short – what is the chance they have tall offspring?

10. In dogs, there is a hereditary type of deafness caused by a recessive gene. Two dogs who carry the gene for deafness but have normal hearing are mated. What is the percent chance for having a puppy who is deaf?

11. Tongue-curling in humans is a dominant genetic trait. Suppose a man who is homozygous for tongue-curling marries a woman who is heterozygous for this trait. What is the chance they have a child who can curl their tongue?