Question

1. Consider a cross of Yy x Yy pea plants. What is the phenotypic ratio of the F1 progeny. What is the genotypic ratio? If they are different, explain why. (4 pt.) 2. In pea plants, purple flowers (A) are dominant to white (a). You are given a pea plant that has purple flowers. What can you say about the genotype of this plant? Explain how you could use a test cross to determine the plant's genotype. (5 pt.) 3. A large proportion of the genetic diversity in a population is generated through independent assortment of alleles (versions of genes). What event during meiosis leads to independent assortment? Why is this a random event? (5 pt.) 4. During prophase of meiosis I, a recombination event occurs between the A and B genes on the homologous chromosomes shown at the right. Following the recombination event, the chromosomes go through the rest of meiosis I and II. At what point do the A alleles segregate from each other? The B alleles? You must explain your answer fully to get credit. (6 points) A A a a A a A a | | | | | | | | B B b b B B b b Before recombination After recombination

          1. Consider a cross of Yy x Yy pea plants. What is the phenotypic ratio of the F1 progeny. What is the genotypic ratio? If they are different, explain why. (4 pt.)

2. In pea plants, purple flowers (A) are dominant to white (a). You are given a pea plant that has purple flowers. What can you say about the genotype of this plant? Explain how you could use a test cross to determine the plant's genotype. (5 pt.)

3. A large proportion of the genetic diversity in a population is generated through independent assortment of alleles (versions of genes). What event during meiosis leads to independent assortment? Why is this a random event? (5 pt.)

4. During prophase of meiosis I, a recombination event occurs between the A and B genes on the homologous chromosomes shown at the right. Following the recombination event, the chromosomes go through the rest of meiosis I and II. At what point do the A alleles segregate from each other? The B alleles? You must explain your answer fully to get credit. (6 points)

A  A   a  a        A  a   A  a
|  |   |  |        |  |   |  |
B  B   b  b        B  B   b  b

Before recombination    After recombination

1. Consider a cross of Yy x Yy pea plants. What is the phenotypic ratio of the F1 progeny. What is the genotypic ratio? If they are different, explain why. (4 pt.)

2. In pea plants, purple flowers (A) are dominant to white (a). You are given a pea plant that has purple flowers. What can you say about the genotype of this plant? Explain how you could use a test cross to determine the plant's genotype. (5 pt.)

3. A large proportion of the genetic diversity in a population is generated through independent assortment of alleles (versions of genes). What event during meiosis leads to independent assortment? Why is this a random event? (5 pt.)

4. During prophase of meiosis I, a recombination event occurs between the A and B genes on the homologous chromosomes shown at the right. Following the recombination event, the chromosomes go through the rest of meiosis I and II. At what point do the A alleles segregate from each other? The B alleles? You must explain your answer fully to get credit. (6 points)

A A a a A a A a
| | | | | | | |
B B b b B B b b

Before recombination After recombination

Added by Victor Manuel M.

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