Dmitrii's science crossword puzzle

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Across
  1. 7. When both genes are expressed
  2. 8. the physical apperance for a trait
  3. 9. Unit of an inherited material carried on the chromosone.
  4. 10. One of each gene for a trait
Down
  1. 1. the genetic code combination for a trait
  2. 2. Study of heredity- traits passed fro parent to parent
  3. 3. many genes togethor express a trait
  4. 4. two of the same genes for a trait
  5. 5. a trait always expressed when present
  6. 6. masked by dominant
  7. 11. A characteristic inherited from a parent