7th grade semester exam test-bryar

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Across
  1. 4. a segment of DNA that has the code for a specific trait.
  2. 6. one of a pair of genes that controls a certain characteristic.
  3. 7. a living or once living part of an ecosystem.
  4. 8. any living thing
  5. 9. an organism's characteristics.
  6. 10. two
  7. 11. how an organism is built or arranged.
  8. 13. any change in the DNA sequence of a cell.
Down
  1. 1. The scientific study of heredity.
  2. 2. two paired alleles that are different from each other.
  3. 3. a response to a stimulus.
  4. 5. the place an organism lives that provides all of its needs.
  5. 6. a nonliving part of an ecosystem.
  6. 12. the average weather conditions in a certain place over time.