Study the following
I. Prophase - Organisation of chromatin into chromosomes
II. Metaphase - Alignment of chromosomes on equatorial line within the nucleus
III. Anaphase--1-Disjunction of bivalents to form single chromatid chromosomes
IV. Telophase -I - Organisation of haploid daughter nuclei with two chromatid chromosome
The correct combinations are

Options

A. I & III
B. II & IV
C. I & IV
D. II & III

Answer

To solve the question regarding the stages of cell division and their descriptions, we will analyze each statement step by step.

**Step 1: Analyze Prophase**
- The statement for Prophase is: "Organisation of chromatin into chromosomes."
- This statement is **correct**. During prophase, chromatin condenses to form visible chromosomes.

**Hint for Step 1:** Remember that prophase is the stage where chromatin becomes more tightly packed, forming distinct chromosomes.

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**Step 2: Analyze Metaphase**
- The statement for Metaphase is: "Alignment of chromosomes on equatorial line within the nucleus."
- This statement is **incorrect**. In metaphase, chromosomes align along the metaphase plate (equatorial plane), but the nuclear envelope has already broken down.

**Hint for Step 2:** Focus on the fact that during metaphase, the nuclear envelope is not present, and chromosomes align at the metaphase plate.

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**Step 3: Analyze Anaphase**
- The statement for Anaphase is: "Disjunction of bivalents to form single chromatid chromosomes."
- This statement is **correct**. In anaphase I of meiosis, homologous chromosomes (bivalents) separate, and each chromosome is pulled towards opposite poles, resulting in single chromatid chromosomes.

**Hint for Step 3:** Remember that during anaphase, the separation of homologous chromosomes occurs, leading to the formation of single chromatids.

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**Step 4: Analyze Telophase**
- The statement for Telophase is: "Organisation of haploid daughter nuclei with two chromatid chromosomes."
- This statement is **correct**. In telophase I of meiosis, the separated chromosomes reach the poles, and the nuclear envelope reforms around each set of chromosomes, which are still in the form of two chromatids.

**Hint for Step 4:** Recall that telophase involves the reformation of the nuclear envelope around the chromosomes, which are still composed of two chromatids.

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**Conclusion: Identify Correct Combinations**
- Now, let's summarize the correctness of each statement:
- I. Prophase: Correct
- II. Metaphase: Incorrect
- III. Anaphase: Correct
- IV. Telophase: Correct

From this analysis, the correct combinations are:
- **Option 3: I and IV** are correct.

**Final Answer:** The correct combinations are option 3 (I and IV).

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