Biopsychology Topic 2

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Across
  1. 2. Type of gene that masks the expression of another.
  2. 3. Molecule that carries genetic instructions.
  3. 6. Thread-like structures carrying genetic information.
  4. 8. Two identical alleles for a trait.
Down
  1. 1. Darwin’s term for an organism’s ability to survive and reproduce.
  2. 4. Part of the brain involved in complex thought, perception, and motivation.
  3. 5. A gene expressed only when paired with another of its kind.
  4. 7. Process through which species change over generations.