Across
- 1. A threadlike strand of coiled DNA. Humans have 23 pairs
- 4. Creator of the crossword
- 5. The passing of traits from parent to offspring
- 7. The different forms of a gene
- 8. A characteristic
- 9. Deoxyribonucleic acid
Down
- 2. Weak form of a gene which is not expressed when the dominant form is present
- 3. Strong form of a gene which is expressed even if a recessive gene is present
- 6. A unit of genetic material that determines a trait