Question:
The chromosome number of common rice is
The chromosome number of common rice is
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Remember chromosome numbers of important crops:
- Rice: 2n = 24 (n = 12)
- Wheat: 2n = 42 (n = 21)
- Maize: 2n = 20 (n = 10)
- Tomato: 2n = 24 (n = 12)
- Potato: 2n = 48 (n = 24)
Rice is a diploid crop with a small genome.
- Rice: 2n = 24 (n = 12)
- Wheat: 2n = 42 (n = 21)
- Maize: 2n = 20 (n = 10)
- Tomato: 2n = 24 (n = 12)
- Potato: 2n = 48 (n = 24)
Rice is a diploid crop with a small genome.
Updated On: Aug 20, 2026
- 12
- 24
- 36
- 48
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
This question tests knowledge of the chromosome number (2n) of common rice (Oryza sativa).
Step 2: Detailed Explanation:
The somatic chromosome number (2n) of common rice (Oryza sativa) is 24.
This means it has 12 pairs of chromosomes in its diploid cells.
The haploid number (n) is 12.
Rice belongs to the family Poaceae (Gramineae).
Other crop chromosome numbers for comparison:
- Wheat (Triticum): 2n = 42
- Maize (Zea mays): 2n = 20
- Sugarcane: 2n = 80-120 (polyploid)
- Potato: 2n = 48
Thus, option 12 is the haploid number, not the somatic number.
36 and 48 are incorrect for common rice.
Step 3: Final Answer:
Thus, the chromosome number of common rice is 24, which corresponds to option (B).
[0.5cm]
This question tests knowledge of the chromosome number (2n) of common rice (Oryza sativa).
Step 2: Detailed Explanation:
The somatic chromosome number (2n) of common rice (Oryza sativa) is 24.
This means it has 12 pairs of chromosomes in its diploid cells.
The haploid number (n) is 12.
Rice belongs to the family Poaceae (Gramineae).
Other crop chromosome numbers for comparison:
- Wheat (Triticum): 2n = 42
- Maize (Zea mays): 2n = 20
- Sugarcane: 2n = 80-120 (polyploid)
- Potato: 2n = 48
Thus, option 12 is the haploid number, not the somatic number.
36 and 48 are incorrect for common rice.
Step 3: Final Answer:
Thus, the chromosome number of common rice is 24, which corresponds to option (B).
[0.5cm]
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