A Mechanism That Helps Ensure Genetic Variation Is

Question

A mechanism that helps ensure genetic variation is
A) sperm cells not sharing the same genome
B) egg cells not sharing the same genome
C) crossing-over
D) all of the above

Accepted Answer

Sperm and egg cells have only half the number of chromosomes as somatic cells, ensuring genetic variation during fertilization. Crossing-over during meiosis also contributes to genetic variation, as it shuffles genetic material between homologous chromosomes. Therefore, all the given choices, A, B, and C, help ensure genetic variation.