Genetics

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Across
  1. 3. there are ______ billion nucleotides in the human genome
  2. 8. _____ DNA is copied to create an identical strand of DNA
  3. 9. ______ mutation affects a single nucleotide, usually by substituting one nucleotide for another
  4. 11. ______ ribosomes "read" the mRNA and use the information to build proteins
  5. 13. form of a gene
  6. 14. having identical alleles for a gene
  7. 16. _____ mutation when the nucleotide changes and causes an amino acid to change
  8. 18. covered up by the dominate trait
  9. 19. DNA shape, double _____ structure
  10. 20. ______ mutation, the nucleotide changes creates/destroys a start or stop codon
Down
  1. 1. observable traits of an organism
  2. 2. ______ DNA is copied a mRNA, can travel outside the nucleus
  3. 4. scientific study or heredity
  4. 5. Amino ______ folds to form a protein
  5. 6. a length of DNA carrying the code for one feature
  6. 7. an allele that controls the phenotype regardless of what the other allele is
  7. 10. ______ mutation inserts or deletes one or more nucleotide
  8. 12. having different alleles for a gene
  9. 15. Three "letters" of DNA
  10. 17. ______ mutation is when the nucleotide changes but amino acid doesn't