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KEY CONCEPT A population shares a common gene pool.

KEY CONCEPT A population shares a common gene pool. leads to phenotypic variation increases survival is necessary for natural selection is stored in a population’s gene pool- all of the alleles in a population forms New allele combinations in offspring.

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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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