In Drosophila, a recessive allele called transformer (tra), located on chromosome 3 (an autosome), when homozygous, transforms diploid XX females into sterile males, but has no effect on diploid males that are homozygous for tra (tra/tra).

a). What are:

i) the sex chromosome constitutions

ii) the genotypes

iii) the sex phenotypes you would expect in the progeny of a cross between a Tra/tra female and a tra/tra male?

b. From this outcome, what can you say about gene interaction of the tra allele relative to other genes on the X chromosome?

Answer rating: 100% (QA)

Answer i The sex chomosome constitution in a drosophila is given by a balance of female determinants ... View the full answer