Across
- 3. occurs when a few individuals start, or found, a new population.
- 4. occurs when a population suddenly gets much smaller.
- 5. occurs when there are differences in fitness among members of a population.
- 6. occurs when individuals move into or out of a population.
Down
- 1. creates new genetic variation in a gene pool.
- 2. is a random change in allele frequencies that occurs in a small population.