An angiospermic leaf carries 16 chromosomes ,The number of chromosomes in its endosperm will be :

Options

A. 12
B. 8
C. 16
D. 24

Answer

To determine the number of chromosomes in the endosperm of an angiospermic plant that has 16 chromosomes in its leaf, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Chromosome Number in the Leaf**:
- The question states that the angiospermic leaf carries 16 chromosomes. This indicates that the leaf is diploid (2n = 16).

2. **Calculate the Haploid Number (n)**:
- Since the diploid number (2n) is 16, we can find the haploid number (n) by dividing by 2:
\[ n = \frac{2n}{2} = \frac{16}{2} = 8 \]
- Therefore, the haploid number of chromosomes is 8.

3. **Understand the Formation of Endosperm**:
- In angiosperms, the endosperm is formed through a process called double fertilization. This involves the fusion of one male gamete with the egg cell and another male gamete with the two polar nuclei (the secondary nucleus).

4. **Determine the Genetic Composition of the Endosperm**:
- The male gamete is haploid (n = 8), and the secondary nucleus (formed from the fusion of two polar nuclei) is diploid (2n = 16).
- When the male gamete fuses with the secondary nucleus, the resulting endosperm is triploid (3n).

5. **Calculate the Chromosome Number in the Endosperm**:
- The chromosome number in the endosperm can be calculated as follows:
\[ 3n = 3 \times 8 = 24 \]
- Thus, the endosperm will have 24 chromosomes.

6. **Select the Correct Option**:
- Among the options provided (12, 8, 16, 24), the correct answer is 24.

### Final Answer:
The number of chromosomes in the endosperm will be **24**.

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