Read Statements A - D , and select the correct option .
(A.) Mitosis produced two identical daughter cell.
(B.) Meiosis introduces variation due to gene exchange .
(C.) After anaphase , the chromosome has two chromatids.
(D.) Anaphase I is responsible for the reduction in chromosome number of gametes.

Options

A. All are correct
B. A, B , C are correct
C. A, B , D are correct
D. C ,D are correct

Answer

To solve the question, we need to evaluate each statement (A - D) regarding mitosis and meiosis and determine which ones are correct.

### Step-by-Step Solution:

1. **Evaluate Statement A:**
- **Statement:** Mitosis produces two identical daughter cells.
- **Analysis:** This statement is true. Mitosis is a type of cell division that results in two genetically identical daughter cells, maintaining the same chromosome number as the parent cell.
- **Conclusion:** Statement A is correct.

2. **Evaluate Statement B:**
- **Statement:** Meiosis introduces variation due to gene exchange.
- **Analysis:** This statement is also true. Meiosis involves processes such as crossing over during prophase I, where homologous chromosomes exchange genetic material, leading to genetic variation in the resulting gametes.
- **Conclusion:** Statement B is correct.

3. **Evaluate Statement C:**
- **Statement:** After anaphase, the chromosome has two chromatids.
- **Analysis:** This statement is false. After anaphase, sister chromatids are separated and move to opposite poles of the cell. Therefore, each chromosome is now considered a single chromatid, not two.
- **Conclusion:** Statement C is incorrect.

4. **Evaluate Statement D:**
- **Statement:** Anaphase I is responsible for the reduction in chromosome number of gametes.
- **Analysis:** This statement is true. During anaphase I of meiosis, homologous chromosomes are separated, which reduces the chromosome number by half in the resulting gametes.
- **Conclusion:** Statement D is correct.

### Final Evaluation:
- **Correct Statements:** A, B, and D are correct.
- **Incorrect Statement:** C is incorrect.

### Answer:
The correct option is that statements A, B, and D are correct.

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