A series of twopoint crosses among fruit flies is carried ou

A series of two-point crosses among fruit flies is carried out between genes for brown eyes (bw), arc wings (a), vestigial wings (vg), ebony body color (e), and curved wings (cv). The following number of nonrecombinant and recombinant progeny were obtained from each cross. Using these data from two-point crosses, create a genetic map for these genes, providing the order of the genes and the best estimates of the distances separating them.

Solution

% of recombination = R/R+NR X 100 cM

a-----bw distance = 117 / 2341 x 100 = 4.9 cM

a-----cv distance = 823/3432 x 100 = 23.9 cM

a----e distance = 3200/6400 x 100 = 50 cM

a----vg distance = 2379/7551 x 100 = 31 cM

Gene Map is a-----bw--------------------cv-----------vg------------------------------------e

This is the gene order and map