Across
- 4. specialized cell involved in sexual reproduction
- 5. male and female reproductive system cells join
- 8. offspring of crosses between parents with different traits
- 9. factors that determine traits
Down
- 1. specific characteristic that varies from one individual to another
- 2. study of heredity
- 3. separation of alleles during gamete formation
- 6. produces offspring identical to itself
- 7. different forms of a gene