Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism. The phenomenon is called as

Options

A. polyploidy
B. aneuploidy
C. haploidy
D. diploidy

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks about the result of failure of cytokinesis after the telophase stage of cell division, specifically regarding the increase in a whole set of chromosomes in an organism.

2. **Identify Key Terms**:
- Cytokinesis: The process where the cytoplasm of a parental cell divides into two daughter cells.
- Telophase: The final stage of cell division where the chromosomes de-condense and nuclear membranes reform.
- Chromosome Set: Refers to the complete set of chromosomes in a cell.

3. **Analyze the Options**:
- **Polyploidy**: This is the condition of having more than two complete sets of chromosomes. It occurs when there is a failure of cytokinesis, leading to the doubling of the chromosome number.
- **Aneuploidy**: This refers to the addition or loss of one or more chromosomes, resulting in an abnormal number of chromosomes (e.g., 2n + 1 or 2n - 1).
- **Haploidy**: This is the condition of having a single set of chromosomes (n).
- **Diploidy**: This refers to having two complete sets of chromosomes (2n).

4. **Connect the Concepts**: Since the question specifies an increase in a whole set of chromosomes due to the failure of cytokinesis, this aligns with the definition of polyploidy, where the cell ends up with multiple sets of chromosomes.

5. **Conclusion**: The correct answer to the question is **Polyploidy**.

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