The results of a Drosophila test cross between a homozygous recessive male, and a female heterozygous for three genes, y+y, ct+ct, and w+w are listed below.

y+ct+w 773
y ct w+ 872
y ct+w+ 201
y+ct w 209
y+ct w+ 15
y ct+ w 16
y ct w 3
y+ct+w+ 1
total=2090

a. Give the individual chromosome genotypes for both parents, see first sentence "a homozygous
recessive male, and a female heterozygous for three genes"

b. Draw a genetic map showing the order and the distance in cM between the genes

c. Calculate the interference and coincidence for this cross, show your work.