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

Question

During meiosis, which of the following events occurs immediately after synapsis?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: [A]
## CONCEPT FRAMEWORK
	**Primary Concept**: Meiosis and genetic recombination
	**Related Topics**: Homologous chromosome pairing, crossing over, chiasmata
	**Prerequisites**: Understanding of meiosis stages
## SOLUTION PATHWAY
**Given Information**:
		1. Meiosis consists of two rounds of cell division: Meiosis I and Meiosis II.
		2. Synapsis is the pairing of homologous chromosomes.
**Method & Steps**:
	1. After synapsis, homologous chromosomes become tightly paired, forming a structure known as a bivalent or tetrad.
		Reasoning: This pairing allows for genetic exchange between chromosomes.
		Formula/Rule: N/A
	2. The next significant event is crossing over, where segments of chromatids are exchanged between homologous chromosomes at regions called chiasmata.
		Working: This process increases genetic diversity.
		Key Point: Crossing over is essential for recombination and occurs before the chromosomes are separated.
	3. After crossing over, terminalisation of chiasmata occurs, followed by the segregation of homologous chromosomes.
		Result: Therefore, crossing over is the immediate event after synapsis.
		Verification: The sequence of events is well-documented in cell biology.
## OPTION ANALYSIS
[A] ✓: Crossing over occurs immediately after synapsis, facilitating genetic recombination between homologous chromosomes.
[B] :x: Terminalisation of chiasmata occurs later, after crossing over.
[C] :x: Disappearance of nucleolus is not directly linked to the events following synapsis.
[D] :x: Segregation of homologous chromosomes occurs after crossing over and terminalisation.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the order of events: Remember that crossing over happens right after synapsis.
		2. Overlooking the significance of crossing over: It is crucial for genetic diversity.
	**Quick Tips**:
		1. Visualize the stages of meiosis to understand the sequence.
		2. Remember that synapsis leads to genetic recombination through crossing over.

Mr. NARESH KUMAR K · Answer

The correct Option is "Crossing over"

Mr. NARESH KUMAR K · Answer

Terminalisation of chiasmata

Mr. NARESH KUMAR K · Answer

Disappearance of nucleolus

Mr. NARESH KUMAR K · Answer

Segregation of homologous chromosomes

NEET Botany Cell Cycle and Cell Division Meiosis MCQs

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