Across
- 3. tightly wound up into threadlike structure called chromosomes found in the nucleus of the cell
- 7. DNA is made of 3 parts that together is called this
Down
- 1. molecules that do most of the work in the body for example some are muscle, hair or nails
- 2. these come in pairs; each cell has 23 pairs where half come from mom and the other half from dad
- 4. observable features or characteristics
- 5. specific section of DNA that determines which proteins are made in an organism
- 6. scientific study of genes and heredity, how certain traits are passed down from a parent to their offspring