(1) In Drosophila, the gene for miniature wing "m" is recessive to wild type wing allele. A female heterozygous for both traits was mated to a vermilion-eyed, miniature-winged male. The following data were collected:
140 wild wing, wild eye; 3 wild wing, vermilion eye; 6 miniature wing, wild eye; and 151 miniature wing, vermilion eye
(a) What is the genetic distance between the miniature wing and the vermilion eye gene?
(b) After further study, an additional gene on this chromosome is discovered and called "sable body". It is found to be 10 map united from vermilion eye. It also determined to be 7 map units from the miniature wing gene. Draw a chromosome map showing the relative locations of these three mutations. Use "v" for vermilion "s" for sable, and "m" for miniature.