In a fruit fly (Drosophila melanogaster)family, alleles aer, brt and cts are all homozygous in recessive somatic cells. The 3 loci of aer. brt and cts are linked in order. Crossing the female flies of this family with male wild-type fruit flies, and make F1 heterozygous individuals intercross, the F2 are produced as follows:
+ + + 4365
aer brt cts 1168
aer brt + 278
+ + cts 269
aer + + 150
+ brt cts 141
aer + cts 16
+ brt + 13
(1)Please analyse and calculate the recombination frequency between aer and brt and that between brt and cts.
(2)How much is the coefficient of interference
