21. Population Genetics
Allelic Frequency Changes
05:58
Practice this topic
- Multiple Choice
Which of the following terms describes a change in allelic frequency due to random disappearance of genes in a small population?
- Multiple Choice
A group of finches live on a small, isolate island. One day, a few finches travel to a distant island and start a new population of finches. This type of change in a population is called what?
- Multiple Choice
Which of the following is an example of natural selection?
- Open QuestionCompare and contrast the terms in each of the following pairs:random mating and inbreeding
- Open QuestionCompare and contrast the terms in each of the following pairs:founder effect and genetic bottleneck
- Open QuestionCompare and contrast the terms in each of the following pairs:natural selection and genetic drift
- Open Question
Population geneticists study changes in the nature and amount of genetic variation in populations, the distribution of different genotypes, and how forces such as selection and drift act on genetic variation to bring about evolutionary change in populations and the formation of new species. From the explanation given in the chapter, what answers would you propose to the following fundamental questions?
How do we know the age of the last common ancestor shared by two species?