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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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Written for
- Study Level
- A/AS Level
- Examinator
- AQA
- Subject
- A Level Biology
- Unit
- Genetics, populations, evolution and ecosystems (7402)
All documents for this subject (8)
Document information
- Uploaded on
- July 10, 2025
- Number of pages
- 1
- Written in
- 2024/2025
- Type
- Summary
Subjects
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gene pool
-
allele frequency
-
hardy weinberg
-
population
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