identical molecular profiles - De Anza College


12 déc. 2012 (il y a 9 années et 2 mois)

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Genetically Engineered Foods:

What is genetic engineering (GE) and how does it
differ from traditional breeding?

How prevalent are GE foods in our grocery store?

How does the govt. regulate these crops & foods?


Video: Harvest of Fear

GMO synonymous with genetic engineering

Discussion questions


Traditional Breeding vs
Genetic Engineering


Genetic Engineering

A technique in which genes can be taken
from one organism (plant, virus, bacteria,
animal) and transferred to another, in this
case a plant.


How Common are Genetically
Engineered Foods?

1996, govt. approved genetically engineered crops mixed
with non
genetically engineered crops. They became a
part of our food supply (soda, cereal, chips, mayo, etc)

Currently, about 70% of processed foods in U.S. contain
genetically engineered ingredients.

4 countries grow most of the GE food:

U.S. (60%)

Argentina (soybeans)

Brazil (soybeans)

Canada (canola)

Corn, Soy, Canola and Cotton

Soy, corn and canola have a herbicide tolerant
(HT) gene in seed so field can be sprayed with
herbicide (Round
Up) and not kill the crop.

Up Ready” seeds

Corn & cotton (cottonseed oil) have a Bt gene
incorporated into the plant to resist caterpillars.

Bt is a natural bacteria in the soil that is a toxin for
moth and butterfly larva.


Government Regulators


Monitors GE foods when they are sold as food

Makes decisions on food labeling


Oversees GE crops when they are in the field


Determines the environmental aspects of GE crops.

Interest is in the effects that the crop has on the
environment. They monitor Bt corn


Substantial Equivalence

Indicates that two substances or foods have
identical molecular profiles
, so they are
chemically similar to each other. This is possible
because the introduction of a single gene does
not alter the overall organism but allows it to
produce a small amount of a specific protein (a
new protein).

Substantial Equivalence is the reason the FDA
does not label genetically engineered foods.


To limit GE foods:

Minimize processed foods

Buy organic

Look for “not genetically engineered” for:

Soy: oil, flour, lecithin, protein, isolate, isoflavone

Corn: oil flour, meal, starch, gluten, and HFCS,
modified corn starch, fructose, dextrose, glucose

Canola (rapeseed) & Cotton seed oil

Shop Whole Foods

Choose Trader Joe’s brand products

Shop at farmer’s markets