Genetic variation is based on
A)the inheritance of alleles accumulated during the lifetime of an individual.
B)differences in DNA sequences between the individuals in a population.
C)the accumulation of mutations in somatic cells (as opposed to gametes).
D)the formation of new combinations of alleles during asexual reproduction.

Question

Quizplus · Accepted Answer

Genetic variation is based on the differences in DNA sequences between individuals in a population. These differences arise due to mutations, genetic recombination, and other genetic processes. Inheritance of alleles accumulated during the lifetime of an individual (option A) does not contribute to genetic variation, as only the alleles that are present in the gametes contribute to the next generation. Accumulation of mutations in somatic cells (option C) is not passed on to the offspring and, therefore, does not contribute to genetic variation. Formation of new combinations of alleles during asexual reproduction (option D) does not occur as asexual reproduction is a form of replication that produces genetically identical offspring.

Genetic Variation Is Based on