The female gametopyte of a typical dicot at the time of fertilisation is

Options

A. 8-celled
B. 7-celled
C. 6-celled
D. 5-celled

Answer

### Step-by-Step Solution:

1. **Understanding Female Gametophyte**: The female gametophyte in flowering plants is also known as the embryo sac. In dicots, it typically develops within the ovule.

2. **Cell Count**: At the time of fertilization, the female gametophyte of a typical dicot consists of seven cells.

3. **Cell Types**: These seven cells include:
- **One Egg Cell**: This is the female gamete that will fuse with the male gamete (sperm) during fertilization.
- **Two Synergids**: These cells are located near the egg cell and play a role in guiding the pollen tube to the egg for fertilization. They are part of what is known as the egg apparatus.
- **Three Antipodal Cells**: These cells are located at the opposite end of the embryo sac and do not have a direct role in fertilization.

4. **Central Cell**: In addition to the seven cells, there is one central cell that contains two polar nuclei. This central cell will fuse with another sperm cell during double fertilization to form the triploid endosperm.

5. **Conclusion**: Therefore, the female gametophyte of a typical dicot at the time of fertilization is characterized by having a total of seven cells, which include one egg cell, two synergids, three antipodal cells, and a central cell with two polar nuclei.

### Final Answer:
The female gametophyte of a typical dicot at the time of fertilization is seven-celled.

---