13.3 Mutations
Gene Mutations
• Mutation – change in the genetic material
of a cell
• Point mutations
– Changes in one or a few nucleotid...
Chromosomal Mutations
• Change in the number or structure of
chromosomes
• Can change location of genes on
chromosomes, or...
Effects of Mutations

• Chemical or physical agents in the
environment that can alter genetic
material
• Can help or harm ...
Example
• Sickle cell anemia (see page 318)
–Caused by point mutation
–Causes red blood cells to change shape
–Sickle-shap...
Upcoming SlideShare
Loading in...5
×

Mutations

116

Published on

Published in: Education
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
116
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
3
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Mutations

  1. 1. 13.3 Mutations
  2. 2. Gene Mutations • Mutation – change in the genetic material of a cell • Point mutations – Changes in one or a few nucleotides – Insertions, deletions, substitutions • Frameshift mutations – Reading frame of the genetic code is shifted – Insertions and deletions are examples
  3. 3. Chromosomal Mutations • Change in the number or structure of chromosomes • Can change location of genes on chromosomes, or the number of copies of some genes • Four types are: deletion, duplication, inversion, and translocation (see page 318)
  4. 4. Effects of Mutations • Chemical or physical agents in the environment that can alter genetic material • Can help or harm organisms, although most have little or no effect • Chemical mutagens can include: pesticides, tobacco smoke, and pollutants • Physical mutagens can include: x-rays and ultraviolet light
  5. 5. Example • Sickle cell anemia (see page 318) –Caused by point mutation –Causes red blood cells to change shape –Sickle-shaped cells interfere with blood flow and can cause severe problems in bloodstream
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×