You Discover a Drosophila Male That Is Heterozygous for a Reciprocal

Essay

You discover a Drosophila male that is heterozygous for a reciprocal translocation between the second and third chromosomes,each break having occurred near the centromere (which for these chromosomes is near the center).
a)Draw a diagram showing how these chromosomes would synapse at meiosis.
b)You find that this fly has the recessive genes bw (brown eyes)and eb (ebony body)on the second and third chromosomes,respectively,and wild-type alleles on the translocated ones.The fly is crossed with a female having normal chromosomes and homozygous for bw and eb.What phenotypic classes and in what ratio would be expected in the progeny of this cross? (Hint: Zygotes with an extra chromosome arm or deficient for one do not survive.Also,remember that there is no crossing over in Drosophila males.)