CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

What is Genetic Drift ? Give examples 


Solution

  • Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error).
  • Genetic drift occurs in all populations of non-infinite size, but its effects are strongest in small populations.
  • Genetic drift may result in the loss of some alleles (including beneficial ones) and the fixation, or rise to100\%100%100, percent frequency, of other alleles.
  • Genetic drift can have major effects when a population is sharply reduced in size by a natural disaster (bottleneck effect) or when a small group splits off from the main population to found a colony (founder effect).
Examples:
  • Of the two pink monkeys in the world – one male, one female – the female dies, ensuring that there will never be a pure-bred pink monkey again.
  • A random succession of births results in all other hair colors going extinct within a village full of redheaded people.
  • The freckled dazzle-flower exchanges genetic material with a small population of un-freckled dazzle-flowers. After a few seasons, there are no un-freckled dazzle-flowers left.
  • The last green-eyed person in a small town dies, leaving only brown-eyed and blue-eyed people.

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More


People also searched for
View More



footer-image