Giving three reasons, write how Hardy-Weinberg equilibrium can be affected.

Explanation

### Step-by-Step Solution:

1. **Understanding Hardy-Weinberg Equilibrium**:
The Hardy-Weinberg equilibrium is a principle that states that the allelic frequencies in a population will remain constant from one generation to the next, provided that certain conditions are met. The equation representing this equilibrium is \( p^2 + 2pq + q^2 = 1 \), where:
- \( p \) = frequency of the dominant allele
- \( q \) = frequency of the recessive allele
- \( p^2 \) = frequency of homozygous dominant individuals
- \( 2pq \) = frequency of heterozygous individuals
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