Across
- 3. Darwin's second law of evolution.
- 7. the total amount of genes in a population.
- 9. when a physical body separates two populations.
Down
- 1. the selection of mates because of similar traits.
- 2. when change happens in a few thousand rather than a few million years.
- 4. the change of a species over time.
- 5. when genes move from population to population through migration.
- 6. when old genes leave a population.
- 8. the internal and external appearance of an animal.
- 9. when species evolve very slowly over millions of years.
- 10. when new genes come into a population.
- 11. the process of one species turning into two.