Reference no: EM132620998

QUESTIONS

1. Clearly distinguish between a test cross and a back cross. Use of illustrations is encouraged.

2. Two cats are mated. One of the parent cats is long-haired (recessive allele). The offsprings produced contain two short-haired and three long-haired kittens. What does the second parent look like, and what is its genotype? Use a genetic diagram.

3. Mr. and Mrs. Banda both have tightly curled hair. (The hair form gene shows incomplete dominance. There are two alleles, curly and straight. The heterozygote has wavy hair.) The Bandas have a child with wavy hair. Mr. Banda accuses Mrs. Banda of being unfaithful to him. Is he necessarily justified? Why or why not? Use a genetic diagram to support your argument.

4. A man with dark (dominant), curly (see problem I.5.) hair marries a woman with light, straight hair. Their daughter, who happens to have dark hair, marries a man with light, wavy hair. Answer the following questions about this dark-haired daughter and her family.

a. Draw a Punnett's square for this marriage, and predict the phenotypic ratio among the offspring of the daughter and her husband.

b. What is the chance that they will have a child with hair just like his or her father's?

5. A MSFP student at Cavendish University created a F1 generation of Pisum sativum Plants by crossing a pure breeding Tall, Axial flower pea plant with a pure breeding short, terminal flower pea plant. All the F1 plants were tall, axial flower pea plants. The F1 plants were then self-pollinated.

a. Use a dichotomous tree branching method to show the organisms produced in the F2 generation.

b. Write down the genotypic and phenotypic ratio of the organisms produced in the F2 generation.