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

Crossing over – often, the sister homologous chromosomes of a cell exchange genetic material through recombination of genes.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 zygoteMutation – on rare occasion, there is a slight and random change in the genes of a gametic cell caused by environmental factors.

Writing, you can revisit previous parts of the lesson by returning to the course map. be sure to refer to the lab’s student guide, which you can find on the first page of the lab experiment activity