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Q.

Continuous inbreeding without selection can lead to 

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a

increased productivity

b

hybrid vigour

c

increased fitness 

d

decreased fitness 

answer is D.

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Detailed Solution

Inbreeding increases homozygosity and hence can lead to decreased fitness by increasing the frequency of recessive diseases. Continuous inbreeding, especially close inbreeding reduces fertility and the productivity. It is called inbreeding depression.

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