Question

What are three processes that contribute to genetic variation during sexual reproduction

Answer 1

1. Crossing over – often, the sister homologous chromosomes of a cell exchange genetic material through recombination of genes.
2. Independent assortment/random fertilization – there are numerous variety of ways that the chromosomes of the gametes can combine, after meiosis, through fertilization to form a zygote
3. Mutation – on rare occasion, there is a slight and random change in the genes of a gametic cell caused by environmental factors.