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UPSC 2011: At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us? 1. It is possible to know the pedigree of livestock. 2. It is possible to understand the causes of all human diseases. 3. It is possible to develop disease-resistant animal breeds. Which of the statements given above is/are correct?
(a)1 and 2 only
(b)2 only
(c)1 and 3 only
(d)1, 2 and 3
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Not attemptedCorrect Answer: (c) 1 and 3 only
Gene (linkage) mapping lets scientists trace inheritance of genetic markers, so pedigrees of livestock can be established (statement 1) and markers for desirable traits—such as resistance to specific pathogens—can be selected to breed disease-resistant animals (statement 3). Mapping has not yet revealed the causes of *all* human diseases, which depend on many environmental and multifactorial interactions, so statement 2 is too sweeping. Hence, only 1 and 3 are correct.
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What is the correct answer to this UPSC 2011 Science & Technology question?▼
The correct answer is option (c): 1 and 3 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Biotechnology & Genetics question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2011, GS Paper 1, as Question 5. It falls under Science & Technology > Biotechnology & Genetics.
What is the difficulty level of this UPSC question?▼
This question is rated "moderate". It requires sound conceptual understanding of the topic.
How many UPSC Prelims questions have been asked from Biotechnology & Genetics?▼
UPSC has asked 54 questions from Biotechnology & Genetics (under Science & Technology) across multiple years. Visit the topic page to see the full list and year-wise trends.