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Átirat

Microevolutionary Forces

Yashvi Shah

Genertic Drift

Genetic Drift

Variation in the relative frequencies of different genotypes in a population or species owing to arbitrary events

Population Bottleneck

  • An event that drastically reduces the size of a population, and hence the genetic diversity within it.
  • Caused by various events such as disasters, hunting of species till almost extinction, or the destruction of habitat

Diagram

Examples

1. Northern Elephant Seals

2. Florida Panthers

Examples

Founder Effect

Founder's Effect

Founder effect is the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population.

Diagram

Examples

Example

  • Fumarase Deficiency within a Fundamentalist Church population.

  • Huntington’s Disease

Gene Flow

  • Exchange of genes or genetic material between different populations within a species.
  • Also called Gene Migration or Allele Formation.

Gene Flow

Diagram

Example

  • Resistance to Malaria

Examples

Bibliography

  • https://www.nature.com/scitable/definition/population-bottleneck-300
  • https://www.newscientist.com/article/dn13490-florida-panther-population-fell-to-just-six/
  • https://evolution.berkeley.edu/evolibrary/article/side_0_0/bottlenecks_01
  • https://biologydictionary.net/founder-effect/
  • http://listverse.com/2017/10/27/top-10-examples-of-founder-effects/
  • https://www.sciencedirect.com/topics/earth-and-planetary-sciences/gene-flow
  • https://www.britannica.com/science/gene-flow
  • https://biologywise.com/gene-flow-definition-examples

Bibliography

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