Across
- 2. the system responsible for breaking down large molecules from our food
- 3. swapping out one DNA base for another
- 4. three letters that code for an amino acid
- 9. protects us from UV radiation
- 11. the system that transports nutrients and oxygen to our cells
- 13. uses white blood cells to fight infection
- 14. types of traits that need only one allele to be expressed
- 17. makes 1n cells to pass genetic information on to the next generation
- 19. mutations that do NOT code for new amino acids
- 20. if you change the amino acid sequence you might change the _____ of the protein
- 21. produces hormones
- 22. a section of DNA that codes for a protein
- 23. a picture of our chromosomes
- 24. - the intermediate between DNA and amino acid
Down
- 1. changes in the DNA
- 5. those that are fit survive and reproduce
- 6. the system that exchanges gases with our environment
- 7. differences in genes and traits
- 8. types of traits that need two alleles to be expressed
- 10. the system that controls everything by responding to stimuli from the environment
- 12. building blocks of proteins
- 15. the factor in the environment that chooses who is fit and who is not
- 16. when organisms fight for the same resources
- 18. radiation from the sun that can harm our DNA