DNA and Mutations - PowerPoint PPT Presentation

About This Presentation
Title:

DNA and Mutations

Description:

DNA and Mutations DNA Molecule Make-up ... Genes and Proteins The order of the bases determines the order of the amino acids in a protein ... Malaria Sickle Cell ... – PowerPoint PPT presentation

Number of Views:85
Avg rating:3.0/5.0
Slides: 20
Provided by: Charle744
Learn more at: https://www.lcps.org
Category:

less

Transcript and Presenter's Notes

Title: DNA and Mutations


1
DNA and Mutations
2
DNA Molecule Make-up
  • Human DNA consists of 3 billion base pairs
  • The bases of A, T, G, and C form the alphabet of
    the genetic code.
  • Groups of the three bases codes a specific amino
    acid.

3
Examples
  • CCA code for the amino acid Proline.
  • AGC code for the amino acid Serine.

4
Genes and Proteins
  • The order of the bases determines the order of
    the amino acids in a protein.
  • Each gene is a set of instructions for making a
    protein.

5
When things go wrong
  • A mutation is when there is a change in the order
    of the bases in an organisms DNA.
  • Deletion- when a base is deleted
  • Insertion- when a base is added
  • Substitution- When a base is switched

6
Examples
  • A C T C C T G A A G A A A A A
  • T G A G G A C T T C T T T T T
  • A C T C C T G T A G A A A A A
  • T G A G G A C A T C T T T T T

7
Mutagens
  • Anything that can cause a mutation in DNA.
  • Mostly by physical or chemical agents.

8
Other examples
  • Asbestos
  • Chemicals in cigarette smoke
  • pollution

9
So are they always bad??
  • Mutations can hurt, help, or have no effect on
    organisms.
  • Diseases like sickle cell anemia
  • Evidence of evolution in organisms
  • No change in organism

10
Mutations
  • Sickle cell anemia

11
Mutations
  • Sickle Cell Anemia

12
Mutations
  • Sickle cell anemia

13
Mutations
  • Good mutations-
  • Genetically engineered food

14
Bad mutations
  • Antibiotic resistant bacteria
  • (bad for us!!!!)

15
Neither good not bad
  • Eye color

16
Or.
  • Depending on where you live, mutations can be
    good or bad
  • Sickle Cell Anemia

17
Malaria
18
Sickle Cell Anemia
19
Inheritance
  • Half-shaded carrier
  • Fully shaded has it
  • Not shaded at all does not have it
Write a Comment
User Comments (0)
About PowerShow.com