A kidney bean shaped eye is produced by a recessive allele [k] on the third chromosome of Drosophila. Orange eye color, called “cardinal” is produced by the recessive allele [cd] on the same chromosome. On this same chromosome is a third locus with a recessive allele [e] that produces ebony body color. Homozygous kidney, cardinal females are mated to homozygous ebony males. The trihybrid F1 females are then test crossed to produce F2. The following progeny were observed:

1761 kidney cardinal
128 kidney, ebony
1761 ebony
97 kidney
138 cardinal
89 ebony, cardinal
6 kidney, ebony, cardinal
8 triple wild type

a. Determine the genotypes of the P and the F1.
b. Construct an accurate genetic map of chromosome 3 in Drosophila.