In: Biology
Which processes lead to most genetic variation in sexually reproducing organisms?
Select all that apply.
Random fertilization, crossing over and independent assortment of chromosomes in meiosis are responsible for genetic variation in sexually reproducing organisms.
Random fertilization is the process by which a random sperm fertilizes an egg, leading to the production of a zygote.
Crossing over takes place once the homologous chromosomes are paired up. Crossing over involves the exchange of genetic information between nonsister chromatids of homologous chromosomes.
Independent assortment of chromosomes occurs during metaphase 1 of meiosis and is responsible for the unique arrangment of chromosomes.