In the fully organized Polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid cell?

Options

A. `3:1:3`
B. `6:0:1`
C. `6:1:0`
D. `3:2:3`

Answer

To solve the question regarding the ratio of haploid, diploid, and triploid cells in a fully organized Polygonum type of embryo sac, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Polygonum Type Embryo Sac**:
- The Polygonum type of embryo sac is a type of female gametophyte found in angiosperms.
- It consists of a total of 7 cells and 8 nuclei.

2. **Identifying the Types of Cells**:
- In the embryo sac, we have the following cells:
- **Synergids**: There are 2 synergids, which are haploid (N).
- **Egg Cell**: There is 1 egg cell, which is also haploid (N).
- **Antipodal Cells**: There are 3 antipodal cells, each of which is haploid (N).
- **Central Cell**: This cell contains 2 polar nuclei, which are haploid (N) each. When they fuse, they form a diploid nucleus (2N).

3. **Counting the Cells and Nuclei**:
- **Haploid Cells**:
- 2 (synergids) + 1 (egg) + 3 (antipodals) = 6 haploid cells (N).
- **Diploid Cells**:
- The central cell is considered a diploid cell because it contains 2 polar nuclei (N + N), which together form a diploid nucleus (2N).
- **Triploid Cells**:
- There are no triploid cells present in the embryo sac before fertilization.

4. **Final Count**:
- **Haploid Cells**: 6
- **Diploid Cells**: 1 (the central cell)
- **Triploid Cells**: 0

5. **Calculating the Ratio**:
- The ratio of haploid to diploid to triploid cells is:
- Haploid: 6
- Diploid: 1
- Triploid: 0
- Therefore, the ratio is 6:1:0.

### Conclusion:
The ratio of haploid, diploid, and triploid cells in a fully organized Polygonum type of embryo sac is **6:1:0**.