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

Question

In meiosis crossing over is initiated at:

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Meiosis
	**Related Topics**: Stages of Meiosis, Genetic Recombination
	**Prerequisites**: Basic knowledge of cell division and meiosis.
## SOLUTION PATHWAY
**Given Information**:
	The question asks for the stage of meiosis where crossing over initiates.
**Method & Steps**:
	1. Recall the stages of prophase I of meiosis: Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis.
		Reasoning: Understanding the sequence of events in meiosis is essential.
	2. Recall that crossing over, or genetic recombination, occurs during the pachytene stage.
		Reasoning: This is a fundamental fact about meiosis.
	3. Identify the correct option.
		Result: The correct answer is Pachytene.
 ## OPTION ANALYSIS
[A] ✓: Pachytene is the stage where crossing over is initiated.
[B] :x: Leptotene is the first stage of prophase I of meiosis where chromosomes begin to condense but crossing over doesn't initiate here.
[C] :x: Zygotene is the stage where homologous chromosomes pair up via synapsis, but crossing over occurs later.
[D] :x: Diplotene is the stage where homologous chromosomes start to separate, and chiasmata become visible, but crossing over has already completed by this stage.
 ## LEARNING AIDS
	**Common Mistakes**:
		1.[Error 1]: Confusing the different stages of meiosis. [How to avoid]: Memorize the sequence of stages and key events of each stage.
		2.[Error 2]: Thinking crossing over occurs at the end of prophase I. [How to avoid]: Remember that crossing over happens during pachytene.
	**Quick Tips**:
		1.[Helpful shortcut]: Use mnemonics to remember the order of prophase I stages (e.g., 'LeZyPaDiDi').
		2.[Memory aid]: Think of 'Pachytene' as 'Pack-ing' genetic material through crossing over.

NISHANTH · Answer

The correct Option is "Pachytene"

NISHANTH · Answer

Leptotene

NISHANTH · Answer

Zygotene

NISHANTH · Answer

Diplotene

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