The Question is from neet-botany cell-cycle-and-cell-division , and it was created by the author K SURESH KUMAR

Question

The major event that occurs during the anaphase of mitosis, which brings about the equal distribution of chromosomes is

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
	**Primary Concept**: Cell Division (Mitosis)
	**Related Topics**: Chromosome structure, Stages of mitosis, Cell cycle
	**Prerequisites**: Basic understanding of cell division and chromosome structure.
## SOLUTION PATHWAY
**Given Information**:
	- Question is about the major event during anaphase of mitosis that leads to equal chromosome distribution.
	- Options include replication, chromatid splitting, centromere splitting, and chromatin condensation.
**Method & Steps**:
	1. **Recall the Stages of Mitosis**:  Recall the order of mitosis phases: prophase, metaphase, anaphase, telophase.
		Reasoning: Each phase has specific events that are important for cell division.
	2. **Understand Anaphase**: Anaphase is when sister chromatids separate and move to opposite poles of the cell.
		Reasoning: This is critical for equal distribution of genetic material.
	3. **Analyze options based on knowledge**: 
		-Replication occurs in interphase, not anaphase. 
		-Chromatids are the sister copies, and they do separate, but the event that causes this is more fundamental.
		-Centromeres are the region that hold the sister chromatids together, so splitting of centromeres leads to chromatid separation.
		-Condensation of chromatin happens during prophase, not anaphase.
		Key Point: The question asks for the *major* event *that brings about* the equal distribution, implying a causal event.
	4. **Identify the correct option**: The splitting of centromeres is the key event that allows sister chromatids to separate, thus distributing chromosomes equally.
		Result: Option C
		Verification: The event directly causes equal chromosome distribution.
## OPTION ANALYSIS
[A] :x: Replication of genetic material happens in interphase prior to mitosis. It does not occur during anaphase.
[B] :x: Splitting of the chromatids is what occurs, but it is a result of the splitting of the centromeres, which is the fundamental event.
[C] ✓: The splitting of the centromeres allows the sister chromatids to separate, which leads to the equal distribution of chromosomes.
[D] :x: Condensation of chromatin occurs in prophase, preparing chromosomes for separation.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing chromatids and centromeres: Understanding that the centromere is the structure that holds chromatids together is crucial. 
		2. Mixing up mitosis phases: Knowing the order and key events of each stage is vital.
	**Quick Tips**:
		1. Visualize the process: Use diagrams of mitosis to understand the spatial relationships of chromosomes during anaphase.
		2. Use mnemonics: Some mnemonics can help remember the order of phases (e.g., IPMAT).

K SURESH KUMAR · Answer

Replication of the genetic material

K SURESH KUMAR · Answer

Splitting of the chromatids

K SURESH KUMAR · Answer

The correct Option is "Splitting of the centromeres"

K SURESH KUMAR · Answer

Condensation of the chromatin

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