Deletion of cetain genes cause

Options

A. Gene mutation
B. Chromosome mutation
C. Gene modification
D. Aneuploidy

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks what happens when certain genes are deleted. We need to identify the type of mutation that results from this deletion.

2. **Identifying the Types of Mutations**: The options provided are:
- Gene mutation
- Chromosome mutation
- Gene modification
- Aneuploidy

3. **Defining Gene Deletion**: Gene deletion refers to the loss of a segment of DNA that contains one or more genes. This can lead to various types of genetic changes.

4. **Analyzing the Options**:
- **Gene Mutation**: This typically refers to changes in the nucleotide sequence of a single gene, often caused by point mutations or small insertions/deletions.
- **Chromosome Mutation**: This involves larger structural changes in chromosomes, including deletions, duplications, inversions, and translocations.
- **Gene Modification**: This term generally refers to changes made to a gene's expression or function, not necessarily due to deletion.
- **Aneuploidy**: This refers to an abnormal number of chromosomes, which is not directly caused by the deletion of genes.

5. **Conclusion**: Since deletion of certain genes results in a structural change in the chromosome itself, it is classified as a chromosome mutation. Therefore, the correct answer is **chromosome mutation**.

### Final Answer:
The deletion of certain genes causes **chromosome mutation**.

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