An angiospermic plant is having 24 chromosomes in it leaf cells the number of chromosomes presnet in synergid pollen grain nucellus & endospem will be respectively

Options

A. 12,12,12,72
B. 8,8,12,36
C. 12,12,24,36
D. 12,12,12,36

Answer

To solve the problem regarding the number of chromosomes in different parts of an angiospermic plant, we will follow these steps:

### Step 1: Understand the Chromosome Number in Leaf Cells
- The problem states that the angiospermic plant has 24 chromosomes in its leaf cells. Leaf cells are diploid (2n), meaning they contain two sets of chromosomes.
- Therefore, the diploid number (2n) is 24.

### Step 2: Determine the Chromosome Number in Synergids
- Synergids are part of the female gametophyte and are haploid (n), meaning they contain one set of chromosomes.
- Since the diploid number is 24, the haploid number will be half of that:
\[ n = \frac{2n}{2} = \frac{24}{2} = 12 \]
- Thus, the number of chromosomes in synergids is **12**.

### Step 3: Determine the Chromosome Number in Pollen Grains
- Pollen grains are the male gametes and are also haploid (n).
- Following the same reasoning as with the synergids, the number of chromosomes in pollen grains is also **12**.

### Step 4: Determine the Chromosome Number in Nucellus
- The nucellus is part of the ovule and is diploid (2n).
- Therefore, it retains the same chromosome number as the leaf cells:
\[ 2n = 24 \]
- Thus, the number of chromosomes in the nucellus is **24**.

### Step 5: Determine the Chromosome Number in Endosperm
- The endosperm is formed from the fusion of one sperm cell with two polar nuclei during fertilization, resulting in a triploid (3n) structure.
- Therefore, the number of chromosomes in the endosperm is:
\[ 3n = 3 \times 12 = 36 \]
- Thus, the number of chromosomes in the endosperm is **36**.

### Final Answer
- The respective number of chromosomes in synergids, pollen grains, nucellus, and endosperm is:
- Synergids: **12**
- Pollen grains: **12**
- Nucellus: **24**
- Endosperm: **36**

### Summary of the Answer
The answer is:
- **12, 12, 24, 36**

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