Which genes show straight inheritance?

Answer

### Step-by-Step Solution:

1. **Understanding Inheritance**: Inheritance refers to the process by which genetic traits are passed from parents to offspring. Different patterns of inheritance exist based on the chromosomes involved.

2. **Identifying Types of Inheritance**: There are several types of inheritance patterns, including autosomal dominant, autosomal recessive, X-linked, and Y-linked inheritance.

3. **Focusing on Y-linked Inheritance**: Y-linked inheritance specifically refers to genes that are located on the Y chromosome. This type of inheritance is unique because it only involves males.

4. **Mechanism of Y-linked Inheritance**: In Y-linked inheritance, the genes on the Y chromosome are passed directly from father to son. This means that any traits associated with these genes will be inherited in a straightforward manner from the male parent to the male offspring.

5. **Conclusion**: Therefore, the genes that show straight inheritance are the Y-linked genes, as they follow a direct path from father to son without being influenced by female genetics.

### Final Answer:
The genes that show straight inheritance are Y-linked genes.

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