Of the different sources of genetic variability which one produces the variation in the combinations of alleles on a single chromosome?
A) independent assortment
B) crossing over
C) random fertilization
D) mutation

Question

Quizplus · Accepted Answer

Crossing over during meiosis produces genetic variability by exchanging segments of homologous chromosomes, resulting in different combinations of alleles on a single chromosome. Independent assortment (A) and random fertilization (C) produce genetic variability by randomly shuffling the different chromosomes and gametes from different parents, respectively. Mutation (D) is a source of genetic variability, but it does not specifically produce variation in combinations of alleles on a single chromosome.

Of the Different Sources of Genetic Variability Which One Produces