The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seeding will be, respectively

Options

A. 12, 24, 12
B. 24, 12, 12
C. 12, 24, 24
D. 24, 12, 24

Explanation

To solve the question regarding the chromosome numbers in the female gamete, zygote, and cells of the seedling of a rice plant, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Male Gamete Chromosome Number**:
- The problem states that the male gametes of the rice plant have 12 chromosomes. This means that the male gamete is haploid (N = 12).

2. **Determine the Female Gamete Chromosome Number**:
- In sexual reproduction, the female gamete must also be haploid. Since the male gamete has 12 chromosomes, the female gamete will also have 12 chromosomes (N = 12).

3. **Calculate the Zygote Chromosome Number**:
- When the male and female gametes fuse during fertilization, they form a zygote. The zygote is diploid (2N) because it contains chromosomes from both gametes. Therefore, the zygote will have:
\[ 12 (from male) + 12 (from female) = 24 \text{ chromosomes (2N = 24)} \]

4. **Determine the Chromosome Number in the Seedling**:
- The cells of the seedling develop from the zygote. Since the zygote is diploid and the ploidy level does not change during the early stages of development, the cells of the seedling will also be diploid. Thus, the chromosome number in the seedling will remain:
\[ 24 \text{ chromosomes (2N = 24)} \]

### Final Summary:
- Female Gamete: 12 chromosomes (haploid)
- Zygote: 24 chromosomes (diploid)
- Cells of Seedling: 24 chromosomes (diploid)

### Answer:
The chromosome numbers in the female gamete, zygote, and cells of the seedling will be 12, 24, and 24, respectively.

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