Step-by-step explanation:
Non disjunction happens when homologous chromosomes, in this circumstance the X and Y or two X sex chromosomes, flop to dispersed, creating a sperm with an X and a Y chromosome or an egg with two X chromosomes. Fertilizing a usual (X) egg with this sperm harvests an XXY offspring (Klinefelter). Klinefelter condition is a inherent disorder that happens in males of all racial and ethnic circumstances. It disturbs sexual growth and may lead to knowledge in capacities. Klinefelter condition happens in around 1 in 500 to 1 in 1,000 boys.