Across
- 2. An observable feature
- 5. These are molecules that carry out important functions in cells and determine our traits
- 6. DNA is packaged into a physical structure called a _______
- 7. An alternative version of a gene
- 8. The molecule that contains the genetic information
Down
- 1. A _____ is the building block of DNA
- 3. _______ ________ are the building blocks of proteins
- 4. a section of DNA with the code for a trait