Variation and genetics

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Across
  1. 2. A specific section of DNA on a chromosome that contains the instructions to make a specific protein, which determines a particular trait.
  2. 4. Variation where characteristics fall into distinct, separate categories with no intermediates. It is usually controlled by a single gene and unaffected by the environment (e.g., blood type, or the ability to roll your tongue).
  3. 6. Differences in traits that are caused by an organism's surroundings, lifestyle, or experiences (e.g., scars, language spoken, or accents).
  4. 8. Differences in traits that are inherited from parents through DNA (e.g., eye color, blood type).
  5. 9. The control center of a cell that contains the cell's genetic material (DNA).
Down
  1. 1. Variation that can take any value within a range. It is usually controlled by multiple genes and influenced by the environment, showing a smooth graduation from one extreme to the other (e.g., height, weight, or hand span).
  2. 3. An alternative or different version of a specific gene. For example, the gene for eye color has different _____________ for blue eyes and brown eyes.
  3. 5. A long, thread-like structure made of DNA and proteins, found in the nucleus of most living cells. It carries genetic information in the form of genes.
  4. 7. The differences in characteristics (traits) between individuals of the same species.