You design Drosophila crosses to provide recombination data for gene a, which is located on the chromosome shown in Figure 15.12. Gene a has recombination frequencies of 14% with the vestigial wing locus and 26% with the brown eye locus. Approximately where is a located along the chromosome?

Video transcript

Hello everyone here. We have a question telling us to assume that we are trying to map for genes in the chromosome given the following recombination frequencies. What will be the sequence of the genes in the chromosome are recombination frequencies are A. B equals 25%. B. C equals 15%. A. D. Equals 15% and B. D. Equals 15%. First we want to find our highest recombination frequency. These two genes are going to be the farthest apart. So that would be B. D. So we know we're gonna have be on London and D. On the opposite. Next we want to see our highest our next highest recombination frequency which is 25% and is a b. So we can put a. Beside d. And it's still gonna be pretty far away from B. And next we have B. C. Equals 15% and A. D. Equals 15%. So A being beside D is good and we'll put our see beside RB. So it will be B. C. A. D. So our answer here is C. Thank you for watching. Bye.