Different types of haemoglobin are produced in different stages of human development. It is an example of

Options

A. Repeated genes
B. Multigene family
C. Gene replacement
D. Split genes.

Answer

To solve the question regarding the different types of hemoglobin produced at various stages of human development, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Hemoglobin Types**:
- Hemoglobin is a protein in red blood cells responsible for transporting oxygen. Different types of hemoglobin are produced at different developmental stages, such as embryonic, fetal, and adult hemoglobin.

2. **Identifying the Genetic Basis**:
- The production of different hemoglobins is controlled by genes. These genes can be categorized based on their functions and similarities.

3. **Exploring Gene Families**:
- A multigene family consists of a group of genes that are similar in sequence and function. They often arise from gene duplication events and can evolve to perform different roles.

4. **Applying the Concept to Hemoglobin**:
- In humans, the different types of hemoglobin (like HbF in fetuses and HbA in adults) are examples of genes that belong to the same multigene family. They have similar functions (oxygen transport) but are expressed at different developmental stages.

5. **Conclusion**:
- Therefore, the production of different types of hemoglobin at various stages of human development is an example of a multigene family.

### Final Answer:
The correct answer is **multigene family**.

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