Genetically Modified Organisms (GMOs) - PowerPoint PPT Presentation

Loading...

PPT – Genetically Modified Organisms (GMOs) PowerPoint presentation | free to download - id: 80be1b-ZTUwO



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Genetically Modified Organisms (GMOs)

Description:

Genetically Modified Organisms (GMOs) Any microorganism, plant or animal that has purposely had its genome altered using genetic engineering technology – PowerPoint PPT presentation

Number of Views:37
Avg rating:3.0/5.0
Slides: 14
Provided by: Dubli88
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Genetically Modified Organisms (GMOs)


1
Genetically Modified Organisms (GMOs)
  • Any microorganism, plant or animal that has
    purposely had its genome altered using genetic
    engineering technology

2
Traditional Genetic Modification
  • Also called Selective Breeding
  • Farmers would always save the best seeds (bigger,
    sweeter or more resistant to disease, etc) from
    their crops to plant for next year.
  • As a result each year the farmer got slightly
    better crops. Change was slight but over many
    generations the change was significant.

3
For example..
  • Balsas teosinte, a wild
  • grass typically found
  • in Mexico, was
  • modified into
  • drum roll please

4
Modern Corn
5
Transgenic Manipulation
  • One or more genes are artificially inserted into
    the DNA of the plants chromosomes.
  • The gene can come from the same type of plant or
    even another type of organism

6
Bt Crops
  • Plants with the Bt sequence of genes can produce
    proteins that protect them from various insects
    such as European corn borer, southwester corn
    borer, tobacco budworm and Colorado potato
    beetle.

7
Lets Engineer..
  • Take toxin from BT DNA and combine with a vector
    (What is a vector?)
  • Short piece of DNA capable of replicating on its
    own when inside a bacterial cell.
  • Now another gene which will make the plants
    resistant to a herbicide is added.
  • The vector, which incorporates the Bt gene, is
    now placed into a bacterium cell.

8
Agrobacterium
  • Causes disease in plants.
  • Has the ability to transfer a portion of it DNA
    into plant cells
  • Once inside a plant cell, its DNA will be
    incorporated into the DNA of one of the plants
    chromosomes.

9
Grow the bacterium
  • By adding it to a growth medium
  • Each time the bacterium divides, so do the
    vectors within
  • Before the blink of an eye you have millions of
    copies of the bacterium and of the vector that
    contains the Bt gene

10
Now for the plant cells.
  • Add small pieces of whatever plant you want to
    modify (e.g. tomato, corn) to the Agrobacteria
  • The DNA of the bacteria enters the plants cells
    and the cells nuclei
  • The vectors DNA (which includes the Bt and
    herbicide resistant gene) becomes integrated with
    the plant cells DNA

11
Grow the plant cells
  • By placing the cells into the growth medium for
    plants
  • In the growth medium, the plant cells multiply
    and form stems, roots and leaves

12
Here comes the herbicide
  • Spray the plants with a herbicide and ONLY the
    cells with the herbicide resistant gene survive
  • Plants are transferred to a growth chamber and
    the plants are allowed to mature

13
(No Transcript)
About PowerShow.com