The number of possible combinations of genes in humans is virtually limitless.One reason is random assortment of chromosomes and the other is
A)random mating.
B)crossing over.
C)reduction division.
D)nondisjunction.
E)spermiogenesis.

Question

Quizplus · Accepted Answer

Crossing over during meiosis results in the exchange of genetic material between homologous chromosomes. This can create new combinations of genes, increasing the number of possible gene combinations in offspring. Random assortment of chromosomes during meiosis also contributes to genetic diversity by randomly distributing homologous pairs of chromosomes to daughter cells. Both of these processes contribute to the almost limitless number of gene combinations possible in humans. The other options listed (random mating, reduction division, nondisjunction, and spermiogenesis) either do not directly contribute to genetic diversity or are specific processes within meiosis that contribute to genetic diversity but are subsumed within the general categories of random assortment and crossing over.

The Number of Possible Combinations of Genes in Humans Is