alleryThe mating of closely related animals within the same breed for about four to six generations is called:
AOutbreeding
BHeterosis
CCross breeding
DInbreeding
Answer & Solution
Correct answer: D. Inbreeding
1. Inbreeding is defined as mating closely related animals of the same breed for 4-6 generations.
2. It accumulates superior genes and exposes harmful recessives for elimination.
3. Outbreeding and cross breeding involve unrelated animals or different breeds, and heterosis is the resulting vigour, so they are wrong.
4. Hence the answer is D.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit "Breeding and Biotechnology", p.297_
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