dna mutations

dna mutations

Storyboard Text

  • Hey josh...Are you coming from the library?
  • Yeah rita...I had some learning of the topic named dna mutations.It was very interesting rita..Shall we discuss about it for sometie?
  • Ok lets have some discussion about dna mutations.Mutations are a change in rna or dna. It results from dna copying mistake made during dna copying , exposure to chemicals.
  • When a gene mutation occurs, the nucleotides are in the wrong order which means the coded instructions are wrong and faulty proteins are made or control switches are changed.
  • Sometimes, gene variants (also known as mutations) prevent one or more proteins from working properly. By changing a gene's instructions for making a protein, a variant can cause a protein to malfunction or to not be produced at all.
  • A point mutation is a change in a single nucleotide in DNA. This type of mutation is usually less serious than a chromosomal alteration. An example of a point mutation is a mutation that changes the codon UUU to the codon UCU. Point mutations can be silent, missense, or nonsense mutations
  • Deletion is a type of mutation involving the loss of genetic material. It can be small, involving a single missing DNA base pair, or large, involving a piece of a chromosome.
  • Duplication is a type of mutation that involves the production of one or more copies of a gene or region of a chromosome.
  • An inversion occurs when a chromosome breaks in two places; the resulting piece of DNA is reversed and re-inserted into the chromosome.
  • Substitution is a type of mutation where one base pair is replaced by a different base pair. A translocation occurs when a piece of one chromosome breaks off and attaches to another chromosome.
  • It was very pleasure to discuss this topic with you Josh . Ok i've to leave now.Bye josh.
  • It was a Nice discussion with you rita.Take care and bye.
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