In D. Melanogaster cherub wings(ch), black body (b) and cinnabar eyes (cn) result from recessive alleles tht are all located on chromosome 2. A homozygous wild-type fly was mated with a cherub, black, and cinnabar fly, andd the resultinf F1 females were test-crossed with cherub, black, and cinnabar males. The following progeny were produced from the testcross:

ch b cn 753
ch+ b+ cn+ 750
ch b+ cn 105
ch+ b cn+ 102
ch+ b cn 40
ch b+ cn+ 41
ch+ b+ cn 4
ch b cn+ 5

a.Determine the linear order of the genes on the chromosome
b.Calculate the recombinant distances between the 3 loci
c.Determine the coefficient of coincidence and the interference for these three loci.