Biology

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Across
  1. 4. he discovered the nucleotide
  2. 6. adds a short segment of RNA
  3. 8. Genes do not produce normal amounts of the pigment melanin
  4. 9. apyramidine that you would find it in ribonucleic acid
  5. 10. organelle responsible for protein synthesis
  6. 13. Absence of the gene that codes for the enzyme that breaks down galactose
  7. 14. He studied two sample ( strain ) of the bacteria streptococcus pneumonia
  8. 16. it causes changing the reading frame of genetic code
  9. 17. The coding sequences on mRNA
  10. 18. composed of two nitrogen ring
  11. 19. is characterized by delayed clotting of the blood resulting an excessive bleeding
Down
  1. 1. links the disconnected strand together
  2. 2. Three nucleotides codes for one amino acid
  3. 3. They have floating circular DNA
  4. 4. An individual who is heterozygous for a recessive disorder
  5. 5. a diagram that traces the inheritance of a particular trait through several generations.
  6. 7. The percentage of twins who both express a given trait
  7. 11. Many phenotypic traits, however, arise from the interaction of multiple pairs of genes
  8. 12. is responsible for unwinding and separating of the two strands
  9. 15. the covalent bond between the amino acid