Discussion
Variation maintained in a population with Mendelian inheritance is explained by :
Answer: C
It is explained by the Hardy-Weinberg principle.
Under Mendelian (particulate) inheritance, alleles pass unchanged from generation to generation. Hardy and Weinberg (1908) showed that, in a large randomly mating population without mutation, migration, selection or drift, allele and genotype frequencies stay constant (\(p^{2} + 2pq + q^{2} = 1\)), so variation is conserved rather than lost.
Blending inheritance would halve variation in every generation, which was a serious problem for Darwin's theory. Natural selection changes allele frequencies rather than preserving them, and spontaneous generation is a discredited idea about the origin of life.
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