Genetics

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Across
  1. 4. The physical appearance of a living thing.
  2. 5. A physical characteristic like hair color, freckles or dimples
  3. 7. The trait that expresses itself more strongly when 2 genes are present.
  4. 10. Two different alleles for a trait (Tt).
  5. 12. Two copies of the same allele (TT).
  6. 13. A section of DNA where instructions for one trait are kept.
  7. 14. The term that describes how the sides of DNA are aligned opposite each other
  8. 16. The cell organelle that holds the chromosomes
  9. 17. Stands for deoxyribose nucleic acid
Down
  1. 1. The base that pairs with Cytosine
  2. 2. The name of the sugar in DNA
  3. 3. X-shaped molecules made of DNA that hold genes.
  4. 6. The base that pairs with Guanine
  5. 8. The base that pairs with Adenine
  6. 9. The shape of a DNA molecule
  7. 11. The trait that is hidden when other traits are preset.
  8. 13. The field of biology that studies how traits are passed down through generations
  9. 15. The base that pairs with Thymine