Consider three different recessive mutations in Drosophila: a, b, and d. The corresponding wild type alleles are A, B, and D. A female heterozygous for these three linked genes is crossed with a male showing recessive phenotype for all three traits. The resulting offspring are shown below:
Phenotype
Number of progeny
ABD 48 , abd 52, AbD 6, aBd 4, ABd 97, abD 93, aBD 348, Abd 352
1.What is the gene sequence?
2.What is the distance between gene A and D in cM?