Q1. [1] § 8.1 ACCUMULATION OF VARIATION DURING REPRODUCTION § 8.2 HEREDITY § 8.2.4 Sex Determination
Chromosomes :
(i) carry hereditary information from parents to the next generation.
(ii) are thread like structures located inside the nucleus of an animal cell.
(iii) always exist in pairs in human reproductive cells.
(iv) are involved in the process of cell division.
The correct statements are :
- (a) (i) and (ii)
- (b) (iii) and (iv)
- (c) (i), (ii) and (iv)
- (d) (i) and (iv)
Previously asked in CBSE board exam
2024 31/1/1 Q9
Generated by claude-sonnet-4-6 · 2026-06-15 06:53 · grounding rag
Model Answer
(c) (i), (ii) and (iv)
Statements (i), (ii), and (iv) are correct. Statement (iii) is wrong because human reproductive cells (gametes) are haploid — they contain only one set of chromosomes, not pairs.
Explanation
- The key trap here is statement (iii): somatic (body) cells have chromosomes in pairs (diploid), but reproductive cells (gametes) have half the number — they are haploid. So (iii) is false.
- Statements (i), (ii), and (iv) are standard textbook facts about chromosomes: they carry hereditary/DNA information, are thread-like structures in the nucleus, and are involved in cell division (DNA copies separate during division).
- The source passage confirms chromosomes carry information for inheritance and are involved in DNA copying/cell division.
If a question refers to an image, map, graph or diagram that is not shown here, find the actual CBSE question paper on the CBSE website:
cbse.gov.in.