In Drosophila,the allele red eyes (bw+)is dominant to the allele for brown eyes (bw).At another gene locus on the same chromosome,the allele for thin wing veins (hv+)is dominant to the allele for heavy wing veins (hv).Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F 1 progeny. -What would be the results of a test cross with the F₁ flies? A)1 brown eye,thin wing veins: 1 red eye,heavy wing veins B)1 brown eye,heavy wing veins: 1 red eye,thin wing veins C)1 brown eye,thin wing veins: 2 red eye,thin wing veins: 1 red eye,heavy wing veins D)1 brown eye,heavy wing veins: 2 red eye,thin wing veins: 1 red eye,thin wing veins

Question

Quizplus · Accepted Answer

The test cross of doubly heterozygous flies (bw+ bw hv+ hv) with homozygous recessive flies (bw bw hv hv) will result in a 1:1:1:1 ratio of the four possible phenotypes: brown eye, thin wing veins; red eye, heavy wing veins; brown eye, heavy wing veins; red eye, thin wing veins.

In Drosophila,the Allele Red Eyes (Bw+)is Dominant to the Allele