Here's a breakdown of the equation and its parts:

* p² + 2pq + q² = 1

* p: Represents the frequency of the dominant allele in the population.

* q: Represents the frequency of the recessive allele in the population.

* p²: Represents the frequency of individuals with two copies of the dominant allele (homozygous dominant).

* 2pq: Represents the frequency of individuals with one copy of each allele (heterozygous).

* q²: Represents the frequency of individuals with two copies of the recessive allele (homozygous recessive).

Example:

Let's say you're studying a population where the frequency of the dominant allele (p) is 0.7, and the frequency of the recessive allele (q) is 0.3.

* p²: 0.7² = 0.49. This means 49% of the population would be homozygous dominant for that trait.

Important Note: The Hardy-Weinberg equation is a theoretical model that describes the ideal situation where a population is not evolving. In real-world populations, allele frequencies can change due to various factors like mutation, gene flow, genetic drift, and natural selection.