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KEY CONCEPT A population shares a common gene pool.

This concept explores how genetic variation within a population leads to phenotypic differences, enhancing survival through natural selection. Genetic diversity is crucial for the evolution of new allele combinations, influenced by factors like mutation, recombination, and hybridization. Allele frequencies in the gene pool can indicate the prevalence of specific alleles. This knowledge is essential for understanding evolutionary processes and adaptation in different species.

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KEY CONCEPT A population shares a common gene pool.

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  1. KEY CONCEPT A population shares a common gene pool.

  2. leads to phenotypic variationincreases survivalis necessary for natural selectionis stored in a population’s gene pool- all of the alleles in a populationforms New allele combinations in offspring

  3. Allele frequencies- the % of any specific allele in the gene pool (no change-allelic equilibrium-not evolving) • measures how common allele is in population • can be calculated for each allele in gene pool

  4. Genetic variation comes from several sources. 1. Mutation is a random change in the DNA of a gene. • can form new allele • can be passed on to offspring IF in reproductive cells • Recombination forms new combinations of alleles. • usually occurs during meiosis • parents’ alleles arranged in new ways in gametes

  5. Genetic variation comes from several sources. 2. Hybridization is the crossing of two different species. • occurs when individuals can’t find mate of own species • topic of current scientific research

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