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Occasionally, a single gene may express ...

Occasionally, a single gene may express more than one effect. The phenomenon is called

A

multiple allelism.

B

mosaicism

C

pleiotropy

D

polygeny

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question:** The question asks about a phenomenon where a single gene expresses more than one effect. This means we are looking for a specific genetic term that describes this situation. 2. **Analyzing the Options:** - **Multiple Allelism:** This refers to the presence of more than two alleles for a particular gene in a population. It does not pertain to a single gene causing multiple effects. - **Mosaicism:** This refers to the presence of two or more genetically different cell lines in the same individual, which is not relevant to the question. - **Pleiotropy:** This is the phenomenon where one gene influences multiple phenotypic traits. This matches the description in the question. - **Polygeny:** This refers to a trait that is controlled by multiple genes, which again does not fit the scenario described. 3. **Identifying the Correct Answer:** Based on the analysis, the correct term that describes a single gene expressing multiple effects is **pleiotropy**. 4. **Conclusion:** Therefore, the answer to the question is **pleiotropy**. ---
**Step-by-Step Solution:** 1. **Understanding the Question:** The question asks about a phenomenon where a single gene expresses more than one effect. This means we are looking for a specific genetic term that describes this situation. 2. **Analyzing the Options:** - **Multiple Allelism:** This refers to the presence of more than two alleles for a particular gene in a population. It does not pertain to a single gene causing multiple effects. - **Mosaicism:** This refers to the presence of two or more genetically different cell lines in the same individual, which is not relevant to the question. - **Pleiotropy:** This is the phenomenon where one gene influences multiple phenotypic traits. This matches the description in the question. ...
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