Genetically Modified Foods

SciTech 11

What is a Genetically Modified (GM) Food?

• Foods that contain an ____________ ______________

• Foods that have a ___________ gene sequence

• Animal products from _____________ ____________

• Products produced by GM organisms

Why are foods genetically modified?

____________________ offers a ______ and ________ method of altering organisms as compared to traditional methods that are _______ _________________

Common GM Foods

_____________ _____________ – herbicide resistant (89%) ________ – pesticide resistant (60%) ________ – contains more vitamin A ________ – milk with more protein ________ – omega-3 fatty acids

http://en.wikipedia.org/wiki/Genetically_modified_food

How is genetic modification possible?

The components of _____ are the ______ in all organisms.

Sequences that ____ ______________ can be _________ from one organism to another.

How can DNA be moved from one organism to another?

Its quite simple,

REALLY!!!

How can DNA be moved from one organism to another?

►Find an organism with the _________ _____________

►_________ the ________________ that codes for the desired trait

►_________ the gene sequence into the __________ of the plant cell

How can DNA be moved from one organism to another?

►Allow the genetically altered cell to _____________________

►Allow the plant to ____________

How can DNA be moved from one organism to another?

A _________ can carry DNA. The vector can be a ________________________. ________ and ___________ also can be utilized to transfer genes.

Possible Benefitsof GM Foods

________________________ Development of crops that can

be grown in ___________________

________________________________________________ Development of _____________

__________ crops Development of salt-tolerant

crops Development of crops that make

more efficient use of nitrogen and other nutrients

Possible Benefits of GM Foods

___________________________________________________►Development of pest

resistant crops ►Reduced herbicide

use is ____________ _________________ and reduces costs for farmers

Possible Benefits of GM Foods

______________________________ Development of _______ resistant crops Development of __________ resistant crops Development of _______ resistant crops

______________________________ Development of foods designed to meet specific

____________________

Who makes sure GM foods are safe?

________________________________________________________

GM foods in the United States are required to be labeled only if the nutritional value is ____________ or a new allergen is introduced.

Possible Risks of GM Foods

_________ might _____________________ to pesticide-producing GM crops

Herbicide-tolerant crops may ________________ weeds, resulting in “_____________"

Possible Risks of GM Foods

• _______________________– Eg: some GMO corn does not

reproduce, so farmers must buy seeds every year

• _________ from GMO crops may travel to wild crops, ______________________

Possible Risks for GM Foods

Certain gene products may be _____________, thus causing _________ ____________________

There may be ___________________ wildlife and beneficial insects

Photo courtesy of T. W. Davies, Cal. Acad. of Sciences.

THE END

Homework Assignment How do you feel about GM foods? Are

they beneficial or harmful? Compare and contrast articles of your choice

from the following web sites. After reading articles from both web sites, use your favorite Internet search engine to find more information on the GM food debate. • http://www.ornl.gov/sci/techresources/

Human_Genome/elsi/gmfood.shtml• www.greenpeace.org

Write a short report on your views about GM foods.