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Phenotypic Frequency Equation:
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Phenotypic frequency is the proportion of individuals in a population that exhibit a particular phenotype. It's calculated by dividing the number of individuals with the phenotype by the total number of individuals in the population.
The calculator uses the Phenotypic Frequency equation:
Where:
Explanation: The equation calculates the frequency of a particular phenotype by considering both homozygous dominant and heterozygous individuals who would display the dominant phenotype.
Details: Phenotypic frequency is fundamental in population genetics, helping researchers understand how traits are distributed in populations and how they might change over time through evolutionary processes.
Tips: Enter the number of homozygous dominant individuals (AA), heterozygous individuals (Aa), and the total population size (N). All values must be positive integers with N ≥ (AA + Aa).
Q1: What's the difference between phenotypic and allelic frequency?
A: Phenotypic frequency measures observable traits, while allelic frequency measures how common an allele is in the gene pool.
Q2: What range is expected for phenotypic frequency?
A: Phenotypic frequency ranges from 0 to 1, where 0 means the phenotype is absent and 1 means it's present in all individuals.
Q3: How does phenotypic frequency relate to Hardy-Weinberg equilibrium?
A: In H-W equilibrium, phenotypic frequencies can be predicted from allelic frequencies using the p² + 2pq + q² formula.
Q4: Can phenotypic frequency change over time?
A: Yes, through evolutionary processes like natural selection, genetic drift, mutation, and gene flow.
Q5: What if my population has more than two phenotypes?
A: You would calculate frequency separately for each distinct phenotype.