Genetics

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Across
  1. 2. when both genes are expressed
  2. 3. one of each gene for a trait
  3. 7. alternative forms of a gene
  4. 8. masked by dominant
  5. 9. always expressed
Down
  1. 1. when both genes are expresses
  2. 4. study of heredity
  3. 5. unit of inherited material
  4. 6. a characteristic inherited from a parent