Across
- 4. The migration of genes in and out of the gene pool for one reason or another
- 5. A sudden reduction in the gene pool due to natural disasters, disease, etc.
- 6. A difference between males and females of a species
Down
- 1. When a population stems from a few common ancestors and carries their traits
- 2. Traits that help organisms reproduce
- 3. Random selection of alleles given to the offspring