(a) How does the Hardy- Weinberg's expression `(p^(2) + 2pq + q^(2) = 1)` explain that genetic equilibrium is maintained in a population ?
(b ) List any two factors that can disturb the genetic equilibrium.

Explanation

### Step-by-Step Solution

**(a) Explanation of Hardy-Weinberg's Expression and Genetic Equilibrium:**

1. **Understanding Genetic Equilibrium:**
- Genetic equilibrium refers to a state in a population where allele frequencies remain constant over generations. This means that the genetic makeup of the population does not change, indicating stability in the gene pool.

2. **Hardy-Weinberg Principle:**
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