Question

Please answer all the questions, they're related

The autosomal recessive allele bw, for brown eyes in Drosophila interacts with the X-linked recessive allele, v, for vermilion eyes, since flies that are recessive for both genes have white eyes. Wild type flies have red eyes. What eye color phenotypes, in what proportions, would be expected in the progeny from a cross of a white-eyed female and a brown eyed male?  Choose the best answer.

Select one:

a. all females with brown eyes, all males with brown eyes

b. all females with white eyes, all males with vermilion eyes

c. all females with brown eyes, all males with white eyes

d. all females would have vermilion eyes, all males would have white eyes

e. all females with white eyes, 1/2 of the males with brown eyes, and 1/2 white eyes

A cross is made between two plants that are pure line genotypes DD FF G¹ G¹, and dd FF, G² G².   D is dominant to d, and G¹ and G² are two codominant alleles of the same gene.  If the plants are crossed and the progeny are self pollinated, how many phenotypic classes are expected in the F2, if you assume D and F are tightly linked, and unlinked to the G locus?

Select one:

a. 6

b. 3

c. 8

d. 12

A cross is made between two plants that are pure line genotypes DD FF G¹ G¹, and dd FF, G² G².   D is dominant to d, and G¹ and G² are two codominant alleles of the same gene.  If the plants are crossed and the progeny are self pollinated, if you assume D and F are tightly linked, and unlinked to the G locus?, what proportion of the F2 progeny would have the genotype dd FF G² G¹?

Select one:

a. 1/4

b. 1/16

c. 1/8

d. 1/64

e. 1/32

Answer 1