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Summary 3.7.2 Populations
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Species exist as one or more populations. A population as a group of organisms of the same species occupying a particular space at a particular time that can potentially interbreed. The concepts of gene pool and allele frequency. The Hardy–Weinberg principle provides a mathematical model, which predicts that allele frequencies will not change from generation to generation. The conditions under which the principle applies. The frequency of alleles, genotypes and phenotypes in a population can be calculated using the Hardy–Weinberg equation: p 2 + 2 p q + q 2 = 1 where p is the frequency of one (usually the dominant) allele and q is the frequency of the other (usually recessive) allele of the gene.
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A/AS Level
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AQA
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A Level Biology
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- Uploaded on
- July 10, 2025
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- Written in
- 2024/2025
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- Summary
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