Non-Mendelian Inheritance

Practice Problems

1. Flower color in snap dragons is governed by two alleles that show incomplete dominance. Determine the genotypes and the phenotypes in the offspring of the following crosses:
a. Red x White
b. Pink x Pink
c. Pink x White
d. Pink x Red

2. ABO blood type is governed by a multiple allele system. Identify the blood types among the offspring if you cross a male with type AB blood with a female with type O blood.

3. A rooster with gray feathers is mated with a hen of the same phenotype. Among their offspring, 15 chicks are gray, 6 are black and 8 are white. What is the simplest explanation for the inheritance of these colors in chickens? What offspring would you predict from the mating of a grey rooster and a black hen?

4. A man with type A blood marries a woman with type B blood. Their child has type O blood. What are the genotypes of these individuals? What other genotypes, and in what frequencies, would you expect in offspring from this marriage?

Answers to follow...