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Gene Flow quiz #3

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  • How can gene flow introduce new alleles into a population?
    Gene flow can introduce new alleles into a population when individuals from another population, carrying different alleles, migrate and reproduce, thereby adding their alleles to the gene pool.
  • What is gene flow in the context of population genetics?
    Gene flow is the movement of individuals or gametes between populations with different allele frequencies, which can alter those frequencies.
  • How does gene flow generally affect the genetic variation between two populations?
    Gene flow usually reduces genetic variation between populations, making them more genetically similar.
  • What can gene flow introduce into a population that affects its genetic diversity?
    Gene flow can introduce new alleles into a population, increasing its genetic diversity.
  • How can gene flow reintroduce alleles that were previously lost in a population?
    If individuals carrying alleles that were lost due to genetic drift migrate into a population, gene flow can reintroduce those alleles.
  • What is an example of gene flow given in the lesson?
    An example is two butterfly populations separated by a river becoming more similar as individuals migrate between them.
  • How does gene flow relate to the process of evolution?
    Gene flow changes allele frequencies in populations, which is a key mechanism driving evolution.
  • What happens to allele frequencies in populations when individuals move between them?
    Allele frequencies in both populations change, typically becoming more similar due to the mixing of alleles.
  • Why is understanding gene flow important for studying evolution?
    Understanding gene flow helps explain how genetic variation is maintained or altered, influencing evolutionary dynamics.
  • Can gene flow counteract the effects of genetic drift? If so, how?
    Yes, gene flow can counteract genetic drift by reintroducing alleles that were lost, thus restoring genetic variation.
  • What is the term for the movement of individuals out of a population, and how does it affect genetic variation between populations?
    The movement of individuals out of a population is called gene flow. Gene flow reduces genetic variation between populations by making their allele frequencies more similar, and it can introduce new alleles or reintroduce lost alleles, enhancing genetic diversity.