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UPSC Prelims 1990 · Agriculture · Beyond Crops
For developing inbred lines in farm animals, following factors are taken into consideration: 1. The crossbreds should be of outstanding type. 2. They should not carry any detrimental genes. 3. Progeny tested animals. 4. Herd size should be large. Of the statements given above, which one of the following combinations of factors is most essential?
- (a) 1 and 4
- (b) 2 and 3
- (c) 1 and 3
- (d) 2 and 4
Show the answer and explanation
Answer: (d) 2 and 4
Animals free of harmful genes and a large herd are essential for developing inbred lines.
The trap
None.
🔒 Inbreeding exposes harmful recessive genes — start with clean stock and large numbers.