Chapter 5, Problem 31P

The following list of four Drosophila mutations indicates the symbol for the mutation, the name of the gene, and the mutant phenotype:

Allele symbol	Gene name	Mutant phenotype
dwp	dwarp	Small body, warped wings
rmp	rumpled	deranged bristles
pld	pallid	pale wings
rv	raven	dark eyes and bodies

You perform the following crosses with the indicated results:

Cross #1: dwarp, rumpled females × pallid, raven males → dwarp, rumpled males and wild-type females

Cross #2: pallid, raven females × dwarp, rumpled males → pallid, raven males and wild-type females

F females from cross #1 were crossed to males from a true-breeding dwarp rumpled pallid raven stock. The 1000 progeny obtained were as follows:

pallid	3
pallid, raven	428
pallid, raven, rumpled	48
pallid, rumpled	23
dwarp, raven	22
dwarp, raven, rumpled	2
dwarp rumpled	427
dwarp	47

Indicate the best map for these four genes, including all relevant data. Calculate interference values where appropriate.