The movement of alleles into a population is an example of , and variation as a result.
The movement of alleles into a population is an example of , and variation as a result.
When there is a sudden, dramatic decrease in the population, this is an example of , and variation as a result.
When a small population is isolated, then starts a new colony, this is an example of , and variation as a result.
A small population of ladybugs is separated from the rest of the population, then start a new colony on a different tree.
This is an example of , and variation as a result.
The blue birds on one side of a river fly across the river and mix their genes with the red birds on the other side of the river.
This is an example of , and variation as a result.
A volcano erupts and kills almost all of the seals in a population.
This is an example of , and variation as a result.
The population of Western deer move into the population of Eastern deer and mix genes.
This is an example of , and variation as a result.
The Indian Ocean tsunami caused one of the largest natural disasters in recorded history, killing an estimated 228,000 people across 15 countries. This catastrophe struck at random and killed many individuals irrespective of the genes they carried.
This is an example of , and variation as a result.
A forest fire kills off a large part of the population of squirrels in a forest. Most of the red-tailed squirrels are killed off, leaving mostly white tailed squirrels behind.
This is an example of , and variation as a result.
The Afrikaner population in South Africa came from a few colonists that settled there hundreds of years ago.
Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington’s disease. Scientists believe this is because the original colonists who settled in this new colony carried the gene with high frequency.
This is an example of , and variation as a result.
In Antarctica, there used to be 4 different allele variations of seals: those with brown fur, white fur, gray fur, and black fur. Seals with gray fur and black fur were hunted in the 1800s in order to make dark fur coats.
This is an example of , and variation as a result.
In a forest, beetles with flat legs stay on the ground, while beetles with hooks can climb trees. A certain predator eats beetles close to the ground. Over time, the frequency of beetles with hooks increases in the population, while the frequency of beetles with flat legs decreases.
Which mechanism of evolution explains the change in allele frequency in the population?
