You are studying three Drosophila genes, vg (vestigial wings), b (black body) and pr (purple eyes) which are located on the same chromosome. You perform a three-point testcross between a female vg b pr / vg+ b+ pr+ fly and a male vg b pr / vg b pr fly (note that genes are arbitrarily ordered when representing the genomes of the flies, as prior to the cross, their order is unknown). Out of a total number of 4197 offspring, you obtain 3433 flies with parental combinations for the three genes, 493 flies that are recombinants for vg relative to parental combinations for b and pr, 249 flies that are recombinants for b relative to parental combinations for vg and pr, and 22 flies that are recombinants for pr relative to parental combinations for vg and b. Based on this data, which gene is located between the other two?

Then try StudyFetch, the AI-powered platform that can answer your questions and teach you more about it!