What does (I) and (II) represent in the given flowchart? Parent cell `overset(M-I)rarr` 2 Daughter cells `overset(M-II)rarr` 4 Daughter cells

Options

A. (I)=2n
(II)=n
B. (I)=n
(II)=n
C. (I)=n
(II) =2n
D. (i)=2n
(ii)=2n

Explanation

To answer the question regarding what (I) and (II) represent in the given flowchart, we need to analyze the process of cell division described in the flowchart.

### Step-by-Step Solution:

1. **Identify the Parent Cell**:
- The flowchart begins with a parent cell, which is indicated to have a chromosome number of 2n (diploid). This means it contains two sets of chromosomes.

2. **First Division (M-I)**:
- The first division is labeled as M-I, which refers to Meiosis I.
- During Meiosis I, the diploid parent cell (2n) undergoes a reductional division.
- This division results in two daughter cells, each with a haploid chromosome number (n).
- Therefore, after M-I, we have:
- 2n (parent cell) → 2 daughter cells (each with n).

3. **Second Division (M-II)**:
- The second division is labeled as M-II, which refers to Meiosis II.
- Meiosis II is an equational division, meaning that the chromosome number remains the same in the daughter cells as in the parent cells of this phase.
- The two daughter cells from Meiosis I (each with n) will divide again to form a total of four daughter cells, each still having the haploid number of chromosomes (n).
- Therefore, after M-II, we have:
- 2 daughter cells (each with n) → 4 daughter cells (each with n).

4. **Conclusion**:
- Based on the above analysis, we can conclude that:
- (I) represents the chromosome number after Meiosis I, which is n.
- (II) represents the chromosome number after Meiosis II, which remains n.

### Final Answer:
- (I) = n (after M-I)
- (II) = n (after M-II)

---