alleryContinued inbreeding in animals reduces fertility and productivity. This decline is known as:
AHybrid vigour effect
BHeterosis advantage
COutbreeding benefit
DInbreeding depression
Answer & Solution
Correct answer: D. Inbreeding depression
1. The text states that continued inbreeding reduces fertility and productivity.
2. This decline is named inbreeding depression, caused by exposure of harmful recessive genes.
3. Hybrid vigour (heterosis) is the opposite effect, seen in outbreeding, so options A, B and C are traps.
4. Hence the answer is D.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Breeding and Biotechnology", p.297_
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