Which of the following statements does not provide an explanation for hybrid vigour ?

Options

A. Under certain circumstances, heterozygotes are superior to either possible homozygotes.
B. Disease-causing, homozygous recessive phenotypes from either parent are masked in the hybrids.
C. Offspring from a hybrid cross usually possess the best of two desirable parents.
D. Inherently, hybrids have no deleterious mutations.

Answer

D

Explanation

Hybrid vigour is increase in the desirable traits in the hybrid individual obtained from crossbreeding. The increase in heterozygosity is underlying cause of hybrid vigour. Inherently, hybrids do have deleterious mutations.