Hardy-Weinberg Practice

Front

What is the Hardy-Weinberg principle?

Back

The Hardy-Weinberg principle states that allele and genotype frequencies in a population will remain constant from generation to generation in the absence of evolutionary influences.

Front

What are the five conditions for a population to be in Hardy-Weinberg equilibrium?

Back

1. No mutations 2. No gene flow (migration) 3. Large population size (no genetic drift) 4. Random mating 5. No natural selection

Front

What does the variable 'p' represent in the Hardy-Weinberg equation?

Back

The frequency of the dominant allele in the population.

Front

What does the variable 'q' represent in the Hardy-Weinberg equation?

Back

The frequency of the recessive allele in the population.

Front

What is the Hardy-Weinberg equation?

Back

p² + 2pq + q² = 1, where p² is the frequency of the homozygous dominant genotype, 2pq is the frequency of the heterozygous genotype, and q² is the frequency of the homozygous recessive genotype.

Front

If p = 0.3, what is q?

Back

q = 1 - p = 1 - 0.3 = 0.7.

Front

What does 2pq represent in the Hardy-Weinberg equation?

Back

2pq represents the frequency of heterozygous individuals in the population.

Front

What does q² represent in the Hardy-Weinberg equation?

Back

q² represents the frequency of the homozygous recessive genotype in the population.

Front

If the frequency of homozygous recessive individuals (q²) is 0.16, what is q?

Back

q = √(0.16) = 0.4.

Front

If a population has allele frequencies of A = 0.6 and a = 0.4, what is the expected frequency of heterozygous individuals?

Back

Expected frequency of heterozygous individuals (2pq) = 2(0.6)(0.4) = 0.48 or 48%.