Commonly in a mature fertilised ovule n, 2n and 3n condition is respectively found in

Options

A. Antipodals, synergids and integuments
B. Egg, nucellus and endosperm
C. Egg, antipodals and nucellus
D. Endosperm, nucellus and egg

Answer

To solve the question regarding the ploidy levels (n, 2n, and 3n) found in a mature fertilized ovule, we will analyze the different components of the ovule and determine their respective ploidy levels.

### Step-by-Step Solution:

1. **Identify the Components of the Fertilized Ovule**:
- The main components of a mature fertilized ovule include the egg cell, synergids, antipodals, integuments, and endosperm.

2. **Determine the Ploidy of Each Component**:
- **Egg Cell**: The egg cell is the female gamete and is haploid (n).
- **Synergids**: These are also derived from the haploid megaspore and are haploid (n).
- **Antipodals**: These cells are found at the opposite end of the embryo sac and are also haploid (n).
- **Integuments**: These are the protective outer layers of the ovule and are diploid (2n).
- **Endosperm**: The endosperm is formed from the fusion of two polar nuclei (2n) and one male gamete (n), resulting in a triploid condition (3n).

3. **Summarize the Ploidy Levels**:
- Egg Cell: n (haploid)
- Synergids: n (haploid)
- Antipodals: n (haploid)
- Integuments: 2n (diploid)
- Endosperm: 3n (triploid)

4. **Arrange the Components in Order of Ploidy**:
- The order of the components based on their ploidy levels is:
- n (Egg Cell)
- 2n (Integuments)
- 3n (Endosperm)

5. **Select the Correct Answer**:
- Based on the analysis, the correct answer to the question "Commonly in a mature fertilized ovule n, 2n and 3n condition is respectively found in" is:
- Egg (n), Integuments (2n), Endosperm (3n).

### Final Answer:
The correct order is: Egg (n), Integuments (2n), Endosperm (3n).

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