Question

A male Drosophila from a wild-type stock is discovered to have only seven chromosomes, whereas normally 2n = 8. Close examination reveals that one member of chromosome IV (the smallest chromosome) is attached to (translocated to) the distal end of chromosome II and is missing its centromere, thus accounting for the reduction in chromosome number. If this male mates with a female with a normal chromosome composition who is homozygous for the recessive chromosome IV mutation eyeless (ey), what chromosome compositions will occur in the offspring regarding chromosomes II and IV?

Answer 1

Chromosome composition [Normal female] (Traus location male! (fo to normal eyeless (monosonit) normal normat e heterozygous. hetero -zygous