A failure in cell division after DNA replication results into

Options

A. Haploidy
B. Diploidy
C. Polyploidy
D. Aneuploidy

Answer

To solve the question "A failure in cell division after DNA replication results into," we need to analyze the options provided: haploidy, diploidy, polyploidy, and aneuploidy. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Terms
- **Haploidy**: This refers to a condition where a cell has a single set of chromosomes (N). It is a normal state for gametes (sperm and egg cells).
- **Diploidy**: This refers to a condition where a cell has two sets of chromosomes (2N). This is the normal state for somatic cells in humans and many other organisms.
- **Polyploidy**: This is a chromosomal abnormality where a cell has more than two paired sets of chromosomes (e.g., 3N, 4N, etc.). It results from a failure in cell division after DNA replication.
- **Aneuploidy**: This refers to a condition where there is an abnormal number of chromosomes due to the gain or loss of one or more chromosomes (e.g., 2N+1 or 2N-1).

### Step 2: Analyze the Question
The question specifically asks about the result of a failure in cell division **after** DNA replication. This implies that the DNA has already been duplicated, but the cell division process (mitosis or meiosis) did not occur correctly.

### Step 3: Identify the Correct Answer
Given that polyploidy is characterized by having more than two sets of chromosomes due to a failure in cell division after DNA replication, it is the correct answer.

- **Polyploidy** occurs when the cell fails to divide properly after DNA replication, leading to a situation where multiple sets of chromosomes are present in a single cell.

### Conclusion
The correct answer to the question is **polyploidy**.

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