If the leaf of. Capsella has 46 number of chromosomes then how many chromosomes number will be there in endosperm

Options

A. 46
B. 23
C. 69
D. 138

Answer

To determine the number of chromosomes in the endosperm of Capsella, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Chromosome Number in Leaf Cells**:
- The leaf of Capsella has 46 chromosomes. This indicates that the organism is diploid (2n), meaning it has two sets of chromosomes.

2. **Determine the Haploid Number**:
- Since the diploid number (2n) is 46, we can find the haploid number (n) by dividing the diploid number by 2.
- Calculation: n = 46 / 2 = 23.
- Thus, the haploid number of chromosomes in Capsella is 23.

3. **Understand the Formation of Endosperm**:
- In angiosperms, the endosperm is formed through a process called triple fusion. This involves the fusion of one male gamete with two polar nuclei (from the ovule).
- As a result, the endosperm is triploid (3n).

4. **Calculate the Chromosome Number in Endosperm**:
- Since the haploid number is 23, the triploid number of chromosomes in the endosperm would be calculated as follows:
- Calculation: 3n = 3 × 23 = 69.
- Therefore, the endosperm of Capsella will have 69 chromosomes.

5. **Conclusion**:
- The endosperm of Capsella contains 69 chromosomes.

### Final Answer:
The number of chromosomes in the endosperm of Capsella is **69**.

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