mendal's puzzle

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Across
  1. 3. an organism with two identical alleles for a trait
  2. 4. an organism's genetic make up
  3. 5. a number that describes how likely it is that an event will occur
  4. 8. allele whose trait is masked in the presence of a dominant allele
  5. 9. physical characteristics of organisms
  6. 11. an organism's physical appearance
  7. 12. factors that control traits
  8. 14. the letter that represents the dominant allele
Down
  1. 1. an allele whose trait always shows up in the organism
  2. 2. a condition in which neither of two alleles of a gene is dominant or recessive
  3. 5. chart used to show possible gene combinations
  4. 6. the letter that represents the recessive allele
  5. 7. an organism with two different alleles for a trait
  6. 10. the scientific study of heredity
  7. 13. the passing of traits from parent to offspring
  8. 15. the different forms of a gene