Haploid, diploid and triploid conditions respectively can be traced in:

Options

A. Egg, Nucellus, Endosperm
B. Antipodal, Egg. Endosperm
C. Endosperm, Nucellus, Synergids
D. Antipodal, Synergids, Integuments

Answer

To answer the question regarding the haploid, diploid, and triploid conditions in flowering plants, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ploidy Levels**:
- **Haploid (n)**: This condition has one set of chromosomes. In flowering plants, gametes (egg and sperm) are haploid.
- **Diploid (2n)**: This condition has two sets of chromosomes. The zygote formed after fertilization is diploid.
- **Triploid (3n)**: This condition has three sets of chromosomes. The endosperm, which nourishes the developing embryo, is typically triploid.

2. **Identifying Structures**:
- **Haploid Structure**: The egg cell is a female gamete and is haploid.
- **Diploid Structure**: The zygote, formed from the fusion of the egg cell and a male gamete, is diploid.
- **Triploid Structure**: The endosperm is formed from the fusion of two polar nuclei and one male gamete, making it triploid.

3. **Analyzing the Options**:
- We need to find a combination of structures that correspond to haploid, diploid, and triploid conditions respectively.
- The correct combination is:
- **Haploid**: Egg
- **Diploid**: Zygote (or Nucellus)
- **Triploid**: Endosperm

4. **Conclusion**:
- The correct answer is that the haploid, diploid, and triploid conditions can be traced in the egg (haploid), zygote (diploid), and endosperm (triploid).

### Final Answer:
The correct option is: **Haploid - Egg, Diploid - Zygote, Triploid - Endosperm.**

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