AP Biology › Understanding Genetic Drift, Bottleneck Effect, and Founder Effect
For natural selection to occur, which of the following must be true of a population?
There was once a population on planet M311, called the Freg, who lived on a planet not unlike Earth. At the height of the Fregs technology and evolution, a collection of asteroids bombarded the planet and the devastation was so great that the planet was split in two, as was the Freg population. Much of the Freg population died, but many still survived on both pieces of M311.
The asteroid was an enormous catastrophe that drastically reduced the Freg population. As a result, their gene pool will be significantly smaller. What is this phenomenon called?
Which of the following is true of genetic drift?
A massive pre-historic earthquake caused the separation of approximately 500 people from the rest of their much larger population by an impassible fissure in the Earth’s crust. Which of the following would be the LEAST helpful in understanding the immediate future of this sub-group during the next fifty years?
When a population is reduced for a short period of time, and only rare alleles are lost, this is referred to as which of these?
A population of wolves is living in an area when a tornado strikes and kills most of the wolves. The population of the wolves has been greatly reduced. Which of the following best describes the impact of the disaster on the genetic makeup of the population of wolves?
A population of geese migrates from Canada to Florida every winter. Individuals from the Canadian population sometimes breed with native Floridian geese. What is this an example of?
Which type of isolation between populations is due to barriers related to time, such as differences in mating periods or differences in the time of day that individuals are most active.
Select the best example of the bottleneck effect.
What is the founder effect?