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Overview of Evolution definitions

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  • Variation
    Differences in observable traits among individuals within a population, forming the raw material for evolutionary processes.
  • Heredity
    Transmission of genetic information from parents to offspring, resulting in resemblance between generations.
  • Selection
    Process where certain inherited traits increase an individual's chances of survival and reproduction in a given environment.
  • Darwin's Finches
    A group of birds used to illustrate how differences in traits like beak size can affect adaptation and evolutionary outcomes.
  • Genetic Drift
    Random changes in allele frequencies within a population, often leading to fixation or loss of alleles over generations.
  • Neutral Mutation
    A genetic change that does not alter the amino acid sequence of a protein, thus having no effect on fitness.
  • Synonymous Mutation
    A DNA sequence change that results in the same amino acid being incorporated, leaving protein function unchanged.
  • Non-synonymous Mutation
    A DNA sequence change that alters the amino acid sequence of a protein, potentially impacting its function.
  • Introns
    Non-coding regions within genes where most neutral mutations occur, typically not affecting protein products.
  • Species Divergence
    The process by which populations accumulate genetic differences, eventually leading to the formation of new species.
  • Single-step Selection
    Evolutionary change resulting from a single, beneficial mutation that is immediately favored by selection.
  • Cumulative Selection
    Gradual accumulation of advantageous traits over multiple generations, enhancing adaptation efficiently.
  • Infinite Monkey Hypothesis
    A thought experiment illustrating how random processes, given enough time, can produce complex outcomes by chance.
  • Gene Pool
    The complete set of alleles present in a population, from which genetic drift and selection operate.
  • Adaptation
    A trait shaped by natural selection that improves an organism's ability to survive and reproduce in its environment.