Population Genetics, Natural Selection
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Evolution | changes in gene frequencies in populations overtime
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| Evolutionary Fitness | the ability of an organism or allele to survive and reproduce to other individuals or alleles within the population
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| Population | A group of organisms that interbreed such as to produce viable offspring
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| Gene Frequency | Numeric rate at which a gene occurs in a gene pool, relative to the other alleles in its gene pair
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| Genetic Diversity | The variety of genes and genotypes in a gene pool
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| Genetic Drift | Changes in gene frequencies owing to random factors
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| Gene Flow | Movement of genes into or out of a population resulting from migration
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| Mutation | Alteration to the nucleotide sequence of a gene
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| Directional Selection | genetically-related change in mean overtime follows a progressive trend.
selective pressure moves population from one average to another
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| Stabilizing Selection | No genetically-related change in population mean overtime.
Selective pressure keeps population centered around an average.
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| Disruptive Selection | Genetically-related change in mean overtime that produces two "means" (modes).
Selective pressure splits population around two "averages" or modes.
Leads to Speciation
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| How to calculate gene frequencies | Example
A = 11, 11/20 = .55 percent
a = 9, 9/20 = .45 percent
11+9 = 20
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