Of the different sources of genetic variability which one causes the variation in the combinations of homologs from paternal and maternal linage found within a haploid cell?
A) independent assortment
B) crossing over
C) random fertilization
D) mutation

Question

Quizplus · Accepted Answer

Independent assortment and crossing over both contribute to the variation in the combinations of homologs from paternal and maternal lineages found within a haploid cell. Independent assortment randomly arranges the homologous pairs of chromosomes during meiosis I, while crossing over can exchange genetic material between homologous chromosomes, creating new combinations of alleles. Random fertilization also contributes to genetic variability but does not specifically relate to the combinations of homologs from paternal and maternal lineages within a single haploid cell. Mutation can introduce new genetic variation but does not directly relate to the combination of homologs.

Of the Different Sources of Genetic Variability Which One Causes