Answer to Question #214546 in Genetics for moe

Question

2.6) An XXX individual may be result of an abnormal complement of chromosomes in the egg or sperm. At what point of meiosis does this abnormality arise in females and in males? What is it due to?

Answer 1

Chromosome abnormalities usually occur when there is an error in cell division. There are two kinds of cell division, mitosis and meiosis. Mitosis results in two cells that are duplicates of the original cell. One cell with 46 chromosomes divides and becomes two cells with 46 chromosomes each.