No two people are genetically identical,except for identical twins.The main source of genetic variation among human individuals is
A)new mutations that occurred in the preceding generation.
B)genetic drift.
C)the reshuffling of alleles in sexual reproduction.
D)environmental effects.

Question

Quizplus · Accepted Answer

The reshuffling of alleles in sexual reproduction is the main source of genetic variation among human individuals. During meiosis, homologous chromosomes exchange DNA segments, resulting in varied combinations of alleles in gametes. These gametes combine during fertilization to create genetically diverse offspring. New mutations may contribute to variation, but they are not the main source. Genetic drift and environmental effects can also influence genetic variation, but they are not as significant as the reshuffling of alleles.

No Two People Are Genetically Identical,except for Identical Twins