An `alpha`- globin chain is coded by the gene present on __________chromosome.

Options

A. `10^(th)`
B. `12^(th)`
C. `14^(th)`
D. `16^(th)`

Answer

To solve the question regarding the chromosome coding for the alpha-globin chain, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Alpha-Globin Chain**: The alpha-globin chain is a component of hemoglobin, which is essential for oxygen transport in the blood.

2. **Identifying the Genes**: The alpha-globin chain is coded by two specific genes known as HbA1 and HbA2. These genes are responsible for producing the alpha-globin protein.

3. **Locating the Genes**: It is important to know where these genes are located. HbA1 and HbA2 are closely linked and are found on the same chromosome.

4. **Chromosome Number**: The genes coding for the alpha-globin chain are located on chromosome number 16. This is a key detail, as mutations in these genes can lead to blood disorders such as thalassemia.

5. **Conclusion**: Therefore, the correct answer to the question is that the alpha-globin chain is coded by the gene present on chromosome number 16.

### Final Answer:
The alpha-globin chain is coded by the gene present on **chromosome 16**.

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