12.1 flashcards
(12 cards)
What is natural selection?
when organisms with traits better suited for their environment tend to survive and reproduce more successfully
What Is an adaptation?
a genetic variation that increases fitness
What is genetic drift?
gene frequency changes due to random events
What is the founder’s effect?
The loss of genetic variation when a population is started by a smaller group from a parent population
What is the bottleneck effect?
When a catastrophic event causes significant reduction in population size, resulting in an increase in variation
Which population size are more susceptible to genetic drift?
smaller populations
What is fitness?
the success an organism has in surviving and reproducing in its environment
What does the pinky stand for in the five fingers of evolution?
population shrinkage
What does the ring finger stand for in the five fingers of evolution?
non-random mating
What does the middle finger stand for in the five fingers of evolution?
mutation
What does the index finger stand for in the five fingers of evolution?
movement
