Question 1 (10 points total)
You have a Drosophila line that is homozygous for autosomal recessive alleles a, b, and c, linked in that order. You cross females of this line with males homozygous for the corresponding wild-type alleles. You then cross the F1 heterozygous males with the heterozygous females. You obtain the following F2 phenotypes (where letters denote recessive phenotypes and pluses denote wild-type phenotypes):
1364 a+b+c+
365 abc
87 abc+
84 a+b+c
47 ab+c+
44 a+bc
5 ab+c
4 a+bc+
a. What is the recombinant frequency between a and b? Between b and c? (Remember, there is no crossing over in Drosophila males.) (5 points)
b. What is the coefficient of coincidence? (5 points)
