The phenomenon by which a new set of population is formed from the change in frequency of some genes is called _______

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a phenomenon that leads to the formation of a new population due to changes in gene frequency.

2. **Identifying Key Terms**: The key terms here are "new set of population," "change in frequency," and "genes."

3. **Exploring Genetic Concepts**: In genetics, changes in gene frequency can occur due to various factors, including natural selection, mutation, gene flow, and genetic drift.

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