3. In the following, two genotypes are crossed:

           
Aa Bb cc x Aa Bb Cc

A. What is the probability of offspring that are homozygous
recessive for all genes.

B. What is the probability of offspring that are homozygous for
only 1 gene?

5. A black-bodied fruit fly with purple eyes is crossed with a
wild-type fly. The resulting F1 flies are all wild-type.
Test-crossing these F1 flies results in the following
offspring:

260 wild-type flies

15 black-bodied flies with wild-type
eyes

18 wild-type bodies with purple
eyes

255 black-bodied flies with purple
eyes

b = black-body mutant allele, p = purple eyes mutant allele

A. Draw a Punnett square for the F1 testcross.

B. Match the number of flies from the testcross with the
appropriate genotype in the Punnett Square above.

C. Which of the flies from the test cross have recombinant
phenotypes?

D. Calculate the recombination frequency in this test cross.

E. Does the data indicate independent assortment of alleles?
Explain your answer.