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

Question

Which stage of meiosis is characterized by the terminalization of chiasmata?

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: D
## CONCEPT FRAMEWORK
 **Primary Concept**: Meiosis stages and chromosomal events
 **Related Topics**: Crossing over, homologous chromosomes, chromosome condensation
 **Prerequisites**: Understanding of meiosis I and II, chiasmata formation
## SOLUTION PATHWAY
**Given Information**:
The question asks about the stage of meiosis where terminalization of chiasmata occurs.
**Method & Steps**:
1. Understanding Chiasmata: Chiasmata are the points where non-sister chromatids of homologous chromosomes cross over during meiosis. This crossing over involves the exchange of genetic material between the chromatids.
2. Terminalization:  As meiosis progresses, the points of crossing over (chiasmata) move towards the ends of the chromosomes. This process is called terminalization.
3. Meiotic Stages:  The different stages of meiosis I are Leptotene, Zygotene, Pachytene, Diplotene, and Diakinesis.  Chiasmata formation begins in pachytene and terminalization is largely complete by diakinesis.
4. Identifying the Stage: Terminalization is most prominent in the Diakinesis stage.  By diakinesis, the chromosomes are fully condensed, and the chiasmata have moved to the chromosome ends.
 Result: Diakinesis is the stage where terminalization of chiasmata is largely complete.
 Verification:  Reviewing the characteristics of each meiotic stage confirms that Diakinesis is the correct answer.
## OPTION ANALYSIS
A :x: Leptotene is an early stage where chromosomes start to condense, but chiasmata are not yet formed.
B :x: Zygotene is when homologous chromosomes begin to pair up (synapsis), but terminalization hasn't begun yet.
C :x: Pachytene is where crossing over occurs and chiasmata are visible, but they are not yet terminalized.
D ✓: Diakinesis is the final stage of prophase I, characterized by maximal chromosome condensation and terminalization of chiasmata.
## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing the order of meiotic stages:  Memorize the sequence of stages (Leptotene, Zygotene, Pachytene, Diplotene, Diakinesis) and the events that occur in each.
  2.Failing to differentiate between chiasma formation and terminalization:  Chiasma formation happens earlier in meiosis, while terminalization occurs later.
 **Quick Tips**:
  1.Use mnemonics or diagrams to help remember the order of meiotic stages and the key events.
  2.Focus on the visual representation of chromosomes in each stage to help understand the process of terminalization.

Mr. NARESH KUMAR K · Answer

Leptotene

Mr. NARESH KUMAR K · Answer

Zygotene

Mr. NARESH KUMAR K · Answer

Pachytene

Mr. NARESH KUMAR K · Answer

The correct Option is "Diakinesis"

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