Retrieving "Gene Pool" from the archives

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1. Gene Flow

   Linked via "gene pool"

   Vectors in Sexual Reproduction
   In sexually reproducing organisms, gene flow requires the successful mating and subsequent fertilization by an individual originating from a different gene pool. The efficiency of this transfer is determined by dispersal distance and reproductive success of the migrant.
   In animal populations, common vectors include:

2. Genetic Drift

   Linked via "gene pool"

   Population Bottlenecks
   A population bottleneck occurs when a population size is drastically reduced for at least one generation due to environmental catastrophe, disease, or human intervention. Even if the population later recovers its numerical size, the genetic diversity lost during the bottleneck phase is not immediately regained. The surviving alleles represent a random sample of the previous gene pool, and drift operates intensely during the contraction phase.
   Founder Effects