Across
- 2. sperm and egg cells join
- 4. two different alleles for a trait
- 6. allele that always shows
- 8. factors that control a trait
- 9. study of heredity
- 10. allele is hidden
Down
- 1. offspring of generations with the same trait
- 3. threadlike structures from DNA and proteins
- 5. daughter cell stage
- 7. different forms of a gene