A species has a diploid number of 2n Meiosis I fails during

A species has a diploid number of 2n. Meiosis I fails during spermatogenesis, the cytoplasm does not divide, and only one daughter cell is produced The resulting sperm fertilizes a normal ovum. What is the chromosomal complement of the 10pts embryo?

Solution

Answer : Meiosis 1 is a reductional division which results in two daughter cells with half the number of chromosomes.

If the Meiosis 1 fails the resulting sperm is still a diploid, and when it fertilized the haploid ovum the embryo will carry 3 sets of chromosomes (polyploidy).Sperm contributes (XY) and ovum (X) resulting in polyploid.

The chromosomal complement will be XXY