DNA Genetics

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