Question

In an individual heterozygous for a reciprocal translocation, which type of segregation results in nonviable gametes?

a)Alternate segregation
b)Adjacent-1 segregation
c)Adjacent-2 segregation
d)Both b and c
e)All types of segregation result in nonviable gametes.

Answer 1

In an individual heterozygous for a reciprocal translocation, both adjacent-1 segregation and adjacent-2 segregation result in nonviable gametes.

Step-by-step explanation:

In an individual heterozygous for a reciprocal translocation, both adjacent-1 segregation and adjacent-2 segregation result in nonviable gametes.

Adjacent-1 segregation occurs when chromosomes segregate in a way that one gamete receives a normal set of chromosomes and the other gamete receives both translocated chromosomes. This results in nonviable gametes.

Adjacent-2 segregation occurs when chromosomes segregate in a way that one gamete receives both normal chromosomes and the other gamete receives both translocated chromosomes. Again, this results in nonviable gametes.