Which of the following is an advantage of inbreeding?

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It exposes harmful recessive genes that can be eliminated by selection.

It increases fertility of the close inbred population.

It decreases homozygosity leading to hybrid vigour.

It allows the desirable qualities of two different breeds to be combined.

answer is A.

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Detailed Solution

Inbreeding exposes harmful recessive genes which otherwise are hidden in heterozygous individuals. Then, these harmful recessive alleles can be eliminated by selection. Inbreeding combined with selection, known as selective inbreeding, increases the productivity of inbred population.
Inbreeding increases homozygosity. Continued inbreeding, especially close inbreeding, usually reduces fertility and even productivity (inbreeding depression).
Heterosis (hybrid vigour), is the improved or increased function of any biological quality in a hybrid offspring. This is a result of outbreeding.
Crossbreeding allows the desirable qualities of two different breeds to be combined.

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