A Drosophila geneticist crossed a female carrying three X-linked recessive genes of interest (cut (c), for a wing phenotype, white (w) for white eyes,and thick (t), for a wing vein phenotype) with a cut, white, thick male. The following male progeny were obtained (1000 total male progeny): For this set of questions, you will answer these three questions about the distance between each pair of genes.
What is the map distance between c and w?