Genetic modification of corn

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14 Δεκ 2012 (πριν από 4 χρόνια και 8 μήνες)

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GENETIC MODIFICATION OF
CORN

Introduction


The Genetic Modification of Corn is a very
common method of genetic modification, it is
done globally, and has a lot of Research and
Evidence citing it, contrary to many other
organisms, since Genetic Modification is
relatively new. This PowerPoint will look into
what GM is, how it is done, its effects, and the
pros and cons of genetically modifying corn.

What is Genetic Modification

Genetic modification is the use of modern
biotechnology methods to change and/or
alter the genes of an organism, generally a
plant or animal

How is it done?

The first step in genetic modification is identifying and
copying a desired trait from an organism. The gene is then
modified (so it works) and transferred into the new organism.
To do this, the gene must be inserted into a single
plant/animal cell where it becomes a permanent part of the
cell’s genetic makeup. The most common method of
transferring genes is Biolistics , which involves coating the
gene construct onto tiny gold or tungsten particles, which are
then shot into the cell using a miniature gun. Plants can re
-
grow from a single cell using ‘tissue culture’ (growing the cell
separate from the organism) procedures.


The Pros


Can be more productive, and yield expected results


More profitable, due to more production


Can be made in massive fields, and distributed to
famine
-
stricken countries


Resistant to insects and other pests, increasing yield.


Better resistance to weeds, pests, disease.

Better texture, flavour, nutritional value.

Longer shelf life, easier shipment.

Better yield, more efficient use of land.

Less herbicides and other chemicals.

Essential if we are to feed the world.

The Cons


Could be considered ethically wrong


Pests start becoming immune and resistant


Still in developing stages, we do not know the
full consequences (good and bad) of GM


Could cross
-
pollinate non
-
gm crops

Current Stance:

At the moment, 70% of American foods have
been genetically modified, It is currently legal
in around 23 countries worldwide, 14
countries have explicitly said they will not
allow the production, export or import of
genetically modified foods. 9 Countries,
including New Zealand, are currently
contemplating whether to allow the trade of
Genetically Modified Foods.

Conclusion

In conclusion, the Genetic modification of Foods
is a relatively new subject, that has not fully
been developed or researched, it is still in its
early phases, and will take many years before
we know the full extent of the consequences of
Genetically modifying foods.

THE END

By: Jay Janarthanan