Question

How does genetic variation arise through meiosis and fertilization? Why are we all so different from one another?

a) Genetic variation arises through meiosis, but fertilization reduces it. We are all so different because of random chance.
b) Genetic variation arises through meiosis and is increased by fertilization. We are all so different because of the blending of traits from our parents.
c) Genetic variation arises through mitosis, but fertilization increases it. We are all so different because of mutations.
d) Genetic variation arises through asexual reproduction, and we are all so different because of environmental factors.

Answer 1

Genetic variation arises through meiosis and is increased by fertilization. During meiosis, genetic recombination, crossing over, and independent assortment of chromosomes create new gene combinations in gametes.

Step-by-step explanation:

Genetic variation arises through meiosis and is increased by fertilization. During meiosis, the process of genetic recombination, crossing over, and independent assortment of chromosomes leads to the creation of new gene combinations in gametes. When these gametes fuse in fertilization, the offspring inherits a unique combination of genes from both parents, resulting in genetic variation among individuals.