Genetic Drift

003 - Genetic Drift

Paul Andersen describes genetic drift as a mechanism for evolutionary change. A population genetics simulator is used to show the importance of large population size in neutralizing random change. The near extinction of the northern elephant is used as an example of the bottleneck effect. The high incidence of total colorblindness due to a typhoon that hit the small island of Pingelap is also included.

Category:

Education

Tags:

• genetic drift
• bottleneck effect
• founder effect
• gene pool
• evolution
• allele
• northern elephant seal
• Pingelap
• educational
• tutorial

[ThornWolf1]

@sellingmypokecards Perhaps in whatever environment the creatures are in having the recessive allele is better. heterozygous or homozygous recessive have a better chance at surviving than homozygous dominant, so the dominant allele starts to die out.

[nkennyish]

Technically the Pinglelap population had gone through a bottle neck effect genetic drift. Founder effect would of been if those 20 people had gotten there from another population, but in reality those 20 people were just left from an existing population that died after the hurricane.

[KC14251]

Harharharharhar!!! Im the second comment...victory is nigh!

[Neeboopsh]

always such well done videos. thank you