In the Fruit Fly Drosophila,there Is a Dominant Gene for Normal

Short Answer

In the fruit fly Drosophila,there is a dominant gene for normal wings and its recessive allele for vestigial wings.At another gene locus on the same chromosome,there is a dominant gene for red eyes and its recessive allele for purple eyes.A male that was heterozygous at both gene loci was mated with a female that was homozygous for both recessive alleles and the following results were observed among the offspring:
Normal wings and red eyes - 420
Vestigial wings and red eyes - 80
Normal wings and purple eyes - 70
Vestigial wings and purple eyes - 430
According to these data,what is the distance,in centimorgans,between these 2 gene loci? (Enter the number only without the units.For example,100 cM would be entered as 100)