In Drosophila, vestigial wing (vg), hairy body (h), and eyeless (ey) are recessive mutations on chromosomes 2,
Question:
In Drosophila, vestigial wing (vg), hairy body (h), and eyeless (ey) are recessive mutations on chromosomes 2, 3, and 4, respectively. Wild-type males that had been irradiated with X rays were crossed to triply homozygous recessive females. The F1 males (all phenotypically wildtype) were then testcrossed to triply homozygous recessive females. Most of the F1 males produced eight classes of progeny in approximately equal proportions, as would be expected if the vg, h, and ey genes assort independently. However, one F1 male produced only four classes of offspring, each approximately one-fourth of the total: (1) wild-type, (2) eyeless, (3) vestigial, hairy, and (4) vestigial, hairy, eyeless. What kind of chromosome aberration did the exceptional F1 male carry, and which chromosomes were involved?
Step by Step Answer:
Principles of Genetics
ISBN: 978-1119142287
7th edition
Authors: D. Peter Snustad, Michael J. Simmons