Across
- 4. a adenine and thymine together, or a guanine and cytosine together are called ____
- 6. complex molecule in a double helix shape that makes up chromosomes
- 10. the process by which DNA is copied during the cell cycle
- 13. allele that is expressed only when two copies of that same allele are present, can be hidden
- 14. a sequence of DNA that codes for a specific protein
- 16. a single-stranded nucleic acid that is copied from one gene along the DNA is a recipe for a protein
- 17. long threadlike structure of DNA molecules that contain the genes
- 18. Structure of DNA molecule
- 20. a person who has the gene for a trait but is not affected (the recessive allele is masked by one that is normal)
- 22. pairs with guanine in DNA
- 23. last name of woman who took the x-ray photo of the double helix
Down
- 1. pairs with adenine in DNA
- 2. allele that is expressed when two different alleles are present
- 3. change in an organism's DNA
- 5. an alternative version of a gene
- 7. a recessive trait on the X chromosome is more likely to appear in people who are biologically ____
- 8. and Crick got the main credit for discovering the structure of DNA
- 9. the study of heredity and the variation of inherited characteristics
- 11. a family tree to look at inherited traits
- 12. these put together in specific patterns create proteins
- 14. pairs with cytosine in DNA
- 15. the cell organelle that acts as the chef to read the RNA instructions for a protein
- 19. Controls reaction rates, regulate cell processes, form bone and muscle, transport substances into cells, and help fight disease
- 21. pairs with thymine in DNA