Apedia

A-Level Biology OCR A

Genetic Founder Effect Populations Smaller Define Describe Consequences

The founder effect occurs when small populations arise from a few isolated individuals, resulting in smaller gene pools with less genetic variation and a higher frequency of rare alleles.

L'effet fondateur se produit lorsque de petites populations sont établies par quelques individus isolés, entraînant des pools géniques plus petits et moins de variation génétique, avec une fréquence accrue des allèles rares.

Front Define the founder effect & describe the consequences of it on the genetic diversity of a population.
Back Founder effect - when small populations arise due to the establishment of new colonies by a few isolated individuals
  • Example of genetic drift
  • New populations have much smaller gene pools & display less genetic variation
  • Frequency of any alleles that were rare in original population will be much higher in new smaller population - will have bigger impact during natural selection

Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.

Next card: Stabilising selection selected extremes frequency alleles birth define

Previous card: Genetic define bottleneck population greatly reduced size decreasing

Up to card list: A-Level Biology OCR A