Two autosomal genes in drosophila code for eye color and wing shape (the wild type is dominant). the genetic symbols for these traits are for eyes: pr: purple and pr+: red and for wings vg: vestigal and vg+: normal.

a. what are the genotypes of a pure-breeding purple vestigial fly and a purebred red normal fly?

b. what do we get if we cross these two pure-breeding lines? give the genotype and the phenotype.

c. what would you expect if you test-cross these f1's?

d. which alleles are from the test-cross individual?

e. the results that morgan got were not what you would expect. instead, he saw fewer of the purple normal (pr pr vg + vg) and red vestigial (pr + pr vg vg). what do these results tell us about the gametes produced by the original heterozygote? f) how did morgan explain these results?

Question

Wilson

17 January, 20:22

+2

Answers (1)

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Giada Hutchinson · Answer 1

The answer is: The gene involved is on the X chromosome.