Which gene is connected with multiple phenotypes?

Options

A. (a) Epistasis
B. (b) Pleiotropy
C. (c) Polygenic inheritance
D. (d) hypostasis

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which gene is associated with multiple phenotypes. This means we are looking for a genetic phenomenon where a single gene influences more than one trait.

2. **Analyzing the Options**:
- **Option A: Epistaxis** - This refers to a situation where one gene masks the expression of another gene. It does not indicate that one gene controls multiple traits. Thus, this option is not correct.
- **Option B: Pleiotropy** - This is the phenomenon where one gene affects multiple phenotypic traits. For example, a mutation in the TYR gene can lead to albinism, which affects skin color, hair color, and eye color. This option seems promising.
- **Option C: Polygenic Inheritance** - This describes a situation where multiple genes influence a single trait. For instance, skin color in humans is controlled by several genes, making this option incorrect for the question.
- **Option D: Hypostasis** - This is the opposite of epistasis, where the effect of one gene is masked by another gene. It does not indicate multiple traits being influenced by a single gene.

3. **Identifying the Correct Answer**: After analyzing all options, we find that **Option B: Pleiotropy** is the correct answer, as it describes a single gene influencing multiple phenotypes.

4. **Conclusion**: Therefore, the gene connected with multiple phenotypes is associated with the concept of pleiotropy.

**Final Answer**: The gene connected with multiple phenotypes is **Pleiotropy** (Option B).

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