In diploid set of chromosomes , deletion and additional of a member leads to

Options

A. Aneuploidy
B. Euploidy
C. Polylploidy
D. Triploidy

Answer

To solve the question regarding the effects of deletion and addition of a member in a diploid set of chromosomes, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Chromosome Sets**:
- A diploid organism has two complete sets of chromosomes, one from each parent. This is denoted as 2n, where n is the number of unique chromosomes.

2. **Identifying Changes in Chromosome Number**:
- When a chromosome is deleted, it means that one of the chromosomes from the diploid set is missing. Conversely, when a chromosome is added, it means there is an extra chromosome in the set.

3. **Defining the Terms**:
- **Aneuploidy**: This condition refers to a change in the number of chromosomes that is not an exact multiple of the haploid number. It can occur due to the addition or deletion of one or more chromosomes.
- **Euploidy**: This refers to the presence of one or more complete sets of chromosomes (like diploidy, triploidy, etc.).
- **Polyploidy**: This is a type of euploidy where there are three or more complete sets of chromosomes.
- **Triploidy**: This is a specific case of polyploidy where there are exactly three sets of chromosomes.

4. **Conclusion**:
- Since the question specifies that there is a deletion or addition of a member (chromosome), this directly leads to aneuploidy. This is because aneuploidy involves changes in chromosome number that are not whole sets, which is precisely what happens when a chromosome is added or deleted.

5. **Final Answer**:
- Therefore, the correct answer to the question is **Aneuploidy**.