Question: Alleles a, b and c are recessive. Females heterozygous for these three loci are crossed to phenotypically a b c males. The progeny are phenotypically as shown below. (+ represents the corresponding wild-type alleles.)
13 + + +
10 a b c
58 + + c
0 + b +
424 a + +
67 a b +
1 a + c
427 + b c
What is the order of the three genes?
abc
bac
cab