RG Genetic Diversity

• What are alleles?

  different versions of a single gene
• What means a high genetic diversity?

  Lots of different allels
• what do lots of different alleles mean?

  High genetic diversity
• What is genetic diversity?


  The number of different alleles of genes in a species or population
• What is a population?

  A group of organisms of one species living in a particular habitat
• What is genetic diversity within a population increased by?

  • Mutations in the DNA
  • Different alleles introduced
• What is genetic diversity within a population increased by?

  Mutations in the DNA- forming new alleles
• What is genetic diversity within a population increased by?

  The introduction of different alleles into a population when individuals from another population migrate into them and reproduce

  = GENE FLOW
• What does genetic diversity allow?

  Genetic diversity is what allows natural selection to occur
• What is a genetic bottleneck?

  An event that causes a big reduction in a population
• give an example of a genetic bottleneck?

  When a large number of organisms within a population die before reproducing
• What does a genetic bottleneck do?

  Reduces the number of different alleles in the gene pool and so reduces genetic diversity
• What do the survivors of the genetic bottleneck do?

  reproduce and a large population is created from a few individuals
• What is the gene pool?

  The complete range of alleles in a population