Mechanisms of evolution Flashcards
In a population of ladybugs, black bugs are more successful in escaping predators. Over time, this gene becomes more popular in the population and the ladybug population loses its red color.
natural selection
A lion gets chased off from his pride, then joins another pride. He mates with a lioness and make 6 lion cubs.
gene flow
A hurricane wipes out half the population of blue jays in Cape Hatteras, North Carolina.
genetic drift
A hawk captures a black mouse in a desert, and leaves a tan mouse behind
natural selection
Ten years ago, in a small population of ducks, two sizes of eyes were observed, large and small. Three ducks have large eyes and 7 have small. 2 of the large-eyed ducks are randomly hit by cars and killed. Today, no large-eyed ducks are present in the population.
genetic drift
A population of flowers on one side of a river transports pollen to the flowers on the other side of the river, producing offspring.
gene flow
A few deer wander out of their native woods into a completely new park where no deer had ever been before. They go on to create an entirely new population.
genetic drift
There was once a large population of cheetah, but about 12,000 years ago most of the cheetahs were killed off because of human activity and only a few survived. What is this an example of?
genetic drift
This mechanism of evolution occurs when populations migrate.
gene flow
Which cannot introduce new alleles into a population’s gene pool?
natural selection
Which are (is) non random
Natural selection
How do you know if there was evolution
change in allele frequency
Modern whales developed their traits through natural selection. What occurs during the process of natural selection?
the fittest organisms survive
