Question

A diploid egg mother cell having 46 chromosomes produces two types of gametes-one with XX-chromosomes plus 22 autosomes and the other with 22 autosomes only. What phenomenon led to this situation?

Answer 1

The phenomenon that led to the production of two types of gametes,one with XX chromosomes plus 22 autosomes and the other with 22 autosomes only,is called non-disjunction of the X chromosome. This occurs when the X chromosomes fail to separate properly during meiosis, resulting in abnormal gametes.