1 / 6

Mutations

Mutations. The fat cat ate the wee rat ???. Point Mutation. = a simple change in one base of the gene sequence. This is equivalent to changing one letter in a sentence, EXAMPLE: where we change the 'c' in cat to an 'h': Original - The fat cat ate the wee rat.

jenn
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 The fat cat ate the wee rat ???

  2. Point Mutation = a simple change in one base of the gene sequence. • This is equivalent to changing one letter in a sentence, • EXAMPLE: where we change the 'c' in cat to an 'h': • Original - The fat cat ate the wee rat. • Point Mutation - The fat hat ate the wee rat.

  3. Frame-shift mutation = one or more bases are inserted or deleted • RESULTS: adding or removing one letter changes ENTIRE STRAND • can make the DNA meaningless and often results in a shortened protein. • EXAMPLE: 't' from cat is removed, but we keep the original letter spacing: • Original - The fat cat ate the wee rat. • Frame Shift - The fat caa tet hew eer at.

  4. Deletion • Mutations that result in missing DNA • Small or large deletions • Deletions can also cause frameshift mutations. • EXAMPLE: the deletion eliminated the word cat. • Original - The fat cat ate the wee rat. • Deletion - The fat ate the wee rat.

  5. Insertion = result in the addition of extra DNA are called insertions. • can also cause frameshift mutations, and usually result in a nonfunctional protein. • EXAMPLE: • Original - The fat cat ate the wee rat. • Insertion - The fat cat xlw ate the wee rat.

  6. Inversion = an entire section of DNA is reversed. • A small inversion may involve only a few bases within a gene, while longer inversions involve large regions of a chromosome containing several genes. • EXAMPLE: • Original - The fat cat ate the wee rat. • Inversion - The fat tar eew eht eta tac.

More Related