Define the term gene flow.

Explanation

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

1. **Definition of Gene Flow**: Gene flow refers to the transfer of genetic material (alleles or genes) from one population to another.

2. **Mechanism of Gene Flow**: This transfer occurs between populations of the same species, as individuals of the same species can interbreed and share their genetic material.

3. **Impact on Gene Pool**: Gene flow results in a change in the composition of the gene pool of the receiving population. The gene pool is the total collection of genes and alleles in a population.

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