What is microevolution ?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Microevolution**: Microevolution refers to small-scale evolutionary changes that occur within a population over time. It is primarily characterized by changes in the frequency of alleles (gene variants) within that population.

2. **Change in Allele Frequency**: The essence of microevolution lies in the alteration of allele frequencies. This means that certain alleles may become more or less common in a population due to various factors.

3. **Time Frame**: Microevolution occurs over a relatively short time frame compared to macroevolution, which involves larger evolutionary changes that can lead to the emergence of new species.

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