The deletion in chromosomes number 16 results in

Options

A. Pleiotropy.
B. quantitative problem of RBC's
C. quantitative problem of WBC's
D. hypertrichosis .

Answer

To solve the question regarding the deletion in chromosome number 16, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Chromosome 16**:
- Chromosome 16 contains approximately 800 to 900 genes. These genes are crucial as they provide instructions for the synthesis of proteins, which perform various functions in the body.

**Hint**: Remember that chromosomes carry genes, and genes encode proteins that have specific functions.

2. **Role of Genes on Chromosome 16**:
- The genes located on chromosome 16 are particularly related to the production and function of red blood cells (RBCs). This indicates that any deletion in this chromosome could potentially affect RBCs.

**Hint**: Focus on the relationship between genes and their respective functions in the body, especially concerning blood cells.

3. **Analyzing the Options**:
- Option A (Pleiotropy): This condition is related to chromosome 12 and is not relevant to chromosome 16.
- Option B (Quantitative problems of RBCs): Given the role of chromosome 16 in RBC function, this option is likely correct.
- Option C (Quantitative problems of WBCs): Chromosome 16 is not primarily associated with WBCs.
- Option D (Hypertrichosis): This condition is linked to chromosome 17 and is not relevant to chromosome 16.

**Hint**: Eliminate options that are not related to chromosome 16 based on the functions of the genes located there.

4. **Conclusion**:
- The deletion in chromosome number 16 results in quantitative problems of RBCs, making option B the correct answer.

**Hint**: Always summarize your findings based on the analysis of the options and the information about the chromosome in question.

### Final Answer:
The deletion in chromosome number 16 results in quantitative problems of RBCs.