Across
- 3. who we get our genes from
- 5. appearance of the organism
- 9. units of heredity
- 12. passed form parent to offspring in genes
- 13. various forms of the same gene
- 14. when the genes of the pair are different
- 16. the genes that make up an organism
Down
- 1. what Mendel used to study genetics
- 2. two genes that control the same characteristic
- 4. genes expressed only with two copies
- 6. when both genes are the same
- 7. number of chromosome pairs in humans
- 8. where chromosomes are found
- 10. where genes are found
- 11. gene that is expressed when only one is present
- 12. shape of the DNA molecule
- 15. father of modern genetics