1 / 11

Mutations

Mutations. What is a mutation?. A mutation is a change in genetic material Two kinds of mutations: Gene mutations Chromosomal mutations. Gene Mutations. Produce changes in a single gene Point mutation – changes in one or a few nucleotides Deletion Addition Substitution.

kerry
Télécharger la présentation

Mutations

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mutations

  2. What is a mutation? • A mutation is a change in genetic material • Two kinds of mutations: • Gene mutations • Chromosomal mutations

  3. Gene Mutations • Produce changes in a single gene • Point mutation – changes in one or a few nucleotides • Deletion • Addition • Substitution

  4. Mutations Practice • ATACGTCAAGAC • ATACGCAAGAC • ATACGTCAAGAC • ATACGTACAAGAC • ATACGTCAAGAC • ATACGCCAAGAC Deletion Insertion Substitution

  5. Changes caused by mutations • ATAACCCAAATC • UAU UGG GUU CUG • Tryosine- Tryptophan – Valine • ATUACGCAAATC • UAU UGC GUU CUG • Tyrosine – Cysteine -Valine

  6. Frameshift Mutation • Shifts the reading frame of the genetic message • ATAACCCAAATC • ATAACCAAATG

  7. Chromosomal Mutations • Changes in the structure of a chromosome

  8. Gene Regulation • Only some genes need to be expressed at any given time. • Some genes are transcribed while others remain silent. • How are genes turned “on” or “off”?

  9. Operon • Operon • Cluster of genes • Found in prokaryotes

  10. Eukaryotic Gene Regulation • TATA box • Short region of DNA • Found before the gene • Helps position RNA polymerase before transcription

More Related