A reason for maternal inheritance is due to genes present in

Options

A. Cytoplasm
B. Mitochondria
C. Lysosmes
D. Nucleolus organising regions of chromosomes

Answer

**Step-by-Step Solution:**

1. **Understanding Maternal Inheritance**: Maternal inheritance refers to the transmission of genetic material from the mother to offspring, primarily through the egg cell (ova). This is distinct from paternal inheritance, which comes from the sperm.

2. **Identifying the Source of Maternal Inheritance**: The question asks for the reason behind maternal inheritance. The key is to identify which cellular components contribute to this inheritance.

3. **Analyzing the Options**:
- **Cytoplasm**: While the cytoplasm of the egg does contribute to the zygote, it is not the specific source of maternal inheritance.
- **Mitochondria**: Mitochondria are organelles found in the cytoplasm of the egg and contain their own circular DNA. This DNA is inherited maternally, as the sperm contributes only its nuclear DNA.
- **Lysosomes**: These are involved in digestion within the cell and do not play a role in genetic inheritance.
- **Nucleolus Organizing Regions of Chromosomes**: These regions are involved in the formation of ribosomes and are located within the nucleus, not contributing to maternal inheritance.

4. **Conclusion**: The only option that directly relates to maternal inheritance due to its own genetic material is mitochondria. Therefore, the correct answer is **mitochondria**.

**Final Answer**: The reason for maternal inheritance is due to genes present in **mitochondria**.

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