Gene and genetic code

Cards (6)

  • The genetic code
    Sequence of base triplet in DNA or mRNA which code for a specific amino acid
  • nature of the genetic code and what it means
    1. non-overlapping
    2. Degenerate
    3. Universal
  • What does non overlapping mean
    Each base is only red once and the adjacent triplets don’t overlap
  • What does degenerate mean?
    Multiple/7 triplets/codons can code for the same amino acid, this limits the effect of mutations
  • What does universal mean?
    The same triplet codes for the same amino acid in all organisms, this makes genetic engineering possible E.G.insulin for diabetics extracted from cows/pigs pancreas
  • What is a gene
    a sequence of DNA nucleotides that codes for a specific protein/polypeptide. It is located on a chromosome and consists of a sequence of codons that are transcribed into mRNA, which is then translated into a polypeptide chain (protein).