Question

Use this information to answer Questions 1 - 4 below. You cross two homozygous pea plants. One parent has round peas, terminal flowers, violet petals, and constricted pods, while the other parent expresses the alternate phenotypes of wrinkled peas, axial flowers, white petals, and full pods. The four traits are controlled by four different genes, each on a separate chromosome.In the F1, all plants have round peas, axial flowers, violet petals, and full pods. In the F2, all possible combinations of these traits were expressed, in ratios consistent with Mendelian inheritance.

How many different phenotypes are present in the F2?

In the F2, what phenotype was the most common?

In the F2 generation, what is the expected frequency of either parental phenotype?

In the F2 generation, what is the expected frequency of either parental genotype?

If the F1 plants were testcrossed, how many different phenotypes would be produced?

Answer 1

Ans: No. of phenotypes in F2= 16 phenotypes. Most common phenotype in F2= round peas, axial flowers, violet petals, and full pods. Frequency of parental phenotype in F2= 3/4 or 0.75 Frequency of parental genotype in F2= 1/2 or 0.50. 16 different phenotypes will be produced if the F1 plants were test crossed (crossing with a recessive individual: rr tt vv cc .