Heredity and Genetics

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Across
  1. 1. A threadlike strand of coiled DNA. Humans have 23 pairs
  2. 4. Creator of the crossword
  3. 5. The passing of traits from parent to offspring
  4. 7. The different forms of a gene
  5. 8. A characteristic
  6. 9. Deoxyribonucleic acid
Down
  1. 2. Weak form of a gene which is not expressed when the dominant form is present
  2. 3. Strong form of a gene which is expressed even if a recessive gene is present
  3. 6. A unit of genetic material that determines a trait