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Variation and Natural Selection.doc

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Department
Biology
Course
BIOL 1004
Professor
All Professors
Semester
Winter

Description
Mutation and Sexual Reproduction produce the genetic variation that makes evolution possibleNOT all variation in a population is heritable the phenotyperesults from a combination of the genotype and environmental influencesonly the genetic component of variation is relevant to natural selection characteristics are determined by a single gene locus with different alleles producing distinct phenotypes But where do alleles come from MUTATION New alleles are produced through mutationUltimate source of variation that serves as raw material for evolution In multicellular organismsonly mutations in cells that produce gametes can be passed down to offspring and affect a populations genetic variabilitysometimes a mutant allele can improve the adaptation of an individual to its environment and
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