Genetics terms

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Across
  1. 5. The genetic makeup of an organism in terms of the alleles present
  2. 7. A ____ allele is only expressed when the dominant allele is absent
  3. 10. The observable physical characteristics of an organism
  4. 11. Having two identical alleles for a gene
  5. 12. Containing two sets of chromosomes
Down
  1. 1. Physical structure made of DNA and protein; holds genes
  2. 2. A section of DNA that codes for a specific protein
  3. 3. Having two different alleles for a gene
  4. 4. An organelle that holds a cell's genetic material
  5. 6. A ____ allele will always be expressed when present
  6. 8. Containing half the normal number of chromosomes
  7. 9. A different version of a gene