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

Question

A student observes a plant cell at telophase that lacks a cell plate. This cell has double the chromosome number compared to other cells at telophase. What is the likely outcome of this observation?

D VINOD · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Cytokinesis and Polyploidy in Plant Cells
 **Related Topics**: Cell cycle, mitosis, meiosis, chromosome number
 **Prerequisites**: Understanding of telophase, cytokinesis, cell plate formation, and polyploidy.
## SOLUTION PATHWAY
**Given Information**:
  * Plant cell at telophase.
  * Absence of cell plate.
  * Double the normal chromosome number.
**Method & Steps**:
 1. Analyze the given information: The cell is in telophase, the final stage of mitosis or meiosis, where chromosomes reach the poles.  The lack of a cell plate indicates that cytokinesis (cell division) has failed. The doubled chromosome number suggests that the two daughter cells did not separate.
  Reasoning:  In plant cells, the cell plate forms during cytokinesis, separating the two daughter cells. Failure of cytokinesis results in a single cell with double the chromosome number.
  Formula/Rule: None directly applicable.
 2. Identify the outcome: A cell with double the normal chromosome number is a polyploid cell.
  Working: The failure of cytokinesis leads to a single cell containing all the chromosomes that would normally be distributed into two daughter cells.
  Key Point: Polyploidy is a common phenomenon in plants.
 3. State the conclusion: The likely outcome is the formation of a polyploid cell.
  Result: Formation of a polyploid cell.
  Verification: The given information directly supports the formation of a polyploid cell due to failed cytokinesis.
 ## OPTION ANALYSIS
A ✓: Formation of a polyploid cell - Correct. This accurately describes the consequence of failed cytokinesis with doubled chromosomes.
B :x: Cell death - Incorrect. While failed cytokinesis can sometimes lead to cell death, it's not the most likely outcome in this scenario. Polyploidy is more common in plants.
C :x: Normal cell division - Incorrect. The observation clearly indicates an abnormal cell division due to the lack of a cell plate and the doubled chromosome number.
D :x: Formation of two daughter cells - Incorrect. The absence of a cell plate directly contradicts the formation of two daughter cells.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing cytokinesis with other phases of cell division: Focus on the role of the cell plate in plant cell division.
  2.Assuming cell death is always the outcome of failed cytokinesis:  Polyploidy is a common alternative.
 **Quick Tips**:
  1.Remember that the cell plate is essential for cytokinesis in plant cells.
  2.Polyploidy often results from failed cytokinesis.

D VINOD · Answer

The correct Option is "Formation of a polyploid cell"

D VINOD · Answer

Cell death

D VINOD · Answer

Normal cell division

D VINOD · Answer

Formation of two daughter cells

NEET Botany Cell Cycle and Cell Division MCQs

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