1 / 6

MUTATIONS

MUTATIONS. What is a gene mutation?. During replication (in DNA), an error may be made that causes changes in the mRNA and proteins made from that part of the DNA These errors or changes are called mutations There are three possible outcomes when DNA sequences change: An improvement

min
Download Presentation

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 gene mutation? • During replication (in DNA), an error may be made that causes changes in the mRNA and proteins made from that part of the DNA • These errors or changes are called mutations • There are three possible outcomes when DNA sequences change: • An improvement • No change at all • A harmful change

  3. Types of Gene Mutations • Pointmutation: • changes in only 1 or a few nucleotides of DNA • Substitution – a point mutation, in which one base changes Point mutation resulting in Sickle Cell Anemia

  4. Types of Gene Mutations • Frameshift mutation: • one base is deleted (deletion) or added (insertion) into a DNA sequence • Causes the entire sequence of codons to shift over by one base Types of Mutations

  5. What are Chromosomal Mutations? • Mutations involving deletions and insertions within a long segment of DNA • Inversion occurs within the same chromosome • Chromosomal rearrangement occurs between different chromosomes Chromosomal inversion Causes of mutations

  6. Why are mutations important? • Mutations in DNA cause changes in the sequence of amino acids, which ultimately creates changes in proteins and their function. Mutations & Enzymes

More Related