What is in q2 Hardy Weinberg equilibrium?
Correct answer: C. Frequency of the homozygous recessive genotype
- A. Frequency of the dominant allele
- B. Frequency of the recessive allele
- C. Frequency of the homozygous recessive genotype
- D. Number of both alleles
Explanation
In Hardy-Weinberg equilibrium, the equation p² + 2pq + q² = 1 is used to describe the distribution of genotypes in a population. Here, p² represents the frequency of the homozygous dominant genotype, 2pq represents the frequency of the heterozygous genotype, and q² represents the frequency of the homozygous recessive genotype. Thus, the correct interpretation of q² is the frequency of individuals with the homozygous recessive genotype. Other options are incorrect because they misinterpret q² as relating to allele frequency or the number of alleles, rather than the specific genotype frequency it represents.
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Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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