Mutations

• Is this image a gene mutation or chromosomal mutation?

  Gene mutation

  
• Gene mutations:

  • When one or more nucleotides change and is deleted, substituted with another nitrogenous base or repeated.
  • this leads to a change in the mRNA
  • therefore different mRNA strands will attract different tRNA molecules with different amino acids
  • creating a different protein
• Karyotypes are an arrangement of chromosomes.
• Look at the last two chromosomes in a karyotype in order to determine the sex of the person.
• Chromosomal mutations occur during occurs during meiosis.
• Chromosomal mutations must occur in the gametes.
• An extra chromosome 21 will result in what syndrome?

  Down syndrome
• Gene mutations result in a change in what process?


  Protein synthesis