genetically modified foods
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Genetically Modified Foods. What Is Biotechnology?. Using scientific methods with organisms to produce new products or new forms of organisms - PowerPoint PPT PresentationTRANSCRIPT
Genetically Modified FoodsGenetically Modified Foods
What Is Biotechnology?What Is Biotechnology?
Using scientific methods with organisms Using scientific methods with organisms to produce new products or new forms to produce new products or new forms of organismsof organisms
Any technique that uses living Any technique that uses living organisms or substances from those organisms or substances from those organisms to make or modify a product, organisms to make or modify a product, to improve plants or animals, or to to improve plants or animals, or to develop microorganisms for specific develop microorganisms for specific uses uses
What Is Biotechnology?What Is Biotechnology?
GMO- genetically modified organisms.GMO- genetically modified organisms. GEO- genetically enhanced organisms.GEO- genetically enhanced organisms. With both, the natural genetic material With both, the natural genetic material
of the organism has been altered.of the organism has been altered. Roots in bread making, wine brewing, Roots in bread making, wine brewing,
cheese and yogurt fermentation, and cheese and yogurt fermentation, and classical plant and animal breedingclassical plant and animal breeding
What Is Biotechnology?What Is Biotechnology?
Manipulation of genes is called Manipulation of genes is called genetic engineering or recombinant genetic engineering or recombinant DNA technologyDNA technology
Genetic engineering involves taking Genetic engineering involves taking one or more genes from a location in one or more genes from a location in one organism and eitherone organism and either Transferring them to another organismTransferring them to another organism Putting them back into the original Putting them back into the original
organism in different combinationsorganism in different combinations
What Are the Areas of What Are the Areas of Biotechnology?Biotechnology?
Organismic biotechnology- uses Organismic biotechnology- uses intact organisms; Does not alter intact organisms; Does not alter genetic materialgenetic material
Molecular biotechnology- alters Molecular biotechnology- alters genetic makeup to achieve specific genetic makeup to achieve specific goalsgoals Transgenic organism- an organism with Transgenic organism- an organism with
artificially altered genetic materialartificially altered genetic material
What Are the Benefits of What Are the Benefits of Biotechnology?Biotechnology?
MedicineMedicine HumanHuman VeterinaryVeterinary BiopharmingBiopharming
EnvironmentEnvironment AgricultureAgriculture Food productsFood products Industry and manufacturingIndustry and manufacturing
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Anton van Anton van
LeeuwenhoekLeeuwenhoek Discovered cellsDiscovered cells
BacteriaBacteria ProtistsProtists Red bloodRed blood
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Gregor Johan Gregor Johan
MendelMendel Discovered Discovered
geneticsgenetics
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Walter SuttonWalter Sutton Discovered Discovered
ChromosomesChromosomes
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Thomas Hunt Thomas Hunt
MorganMorgan Discovered how Discovered how
genes are genes are transmitted transmitted through through chromosomes and chromosomes and sex linkagesex linkage
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Ernst RuskaErnst Ruska Invented the Invented the
electron electron microscopemicroscope
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Sir Alexander Sir Alexander
FlemingFleming Discovered Discovered
penicillinpenicillin
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Rosalind Elsie Rosalind Elsie
FranklinFranklin Research led to the Research led to the
discovery of the discovery of the double helix double helix structure of DNAstructure of DNA
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? James Watson and James Watson and
Francis CrickFrancis Crick Discovered DNADiscovered DNA
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Mary-Claire KingMary-Claire King Mapped human Mapped human
genes for research genes for research of cancer of cancer treatmentstreatments
What Did These Individuals What Did These Individuals Contribute to Contribute to
Biotechnology?Biotechnology? Ian WilmutIan Wilmut Created the first Created the first
true clone, the true clone, the Dorset ewe DollyDorset ewe Dolly
What are GM’s?What are GM’s?
are a result of technology that has are a result of technology that has altered the DNA of living organisms altered the DNA of living organisms (animals, plants or bacteria)(animals, plants or bacteria)
Other terms that mean the same thing:Other terms that mean the same thing: Genetically engineeredGenetically engineered TransgenicTransgenic Recombinant DNA (rDNA) technologyRecombinant DNA (rDNA) technology
How does this differ from How does this differ from Mendel and his peas?Mendel and his peas?
GM vs. Selective breadingGM vs. Selective breadingSelective breadingSelective breading-slow-slow-imprecise-imprecise-modification of genes that naturally occur in the -modification of genes that naturally occur in the
organismorganismGMGM-very fast -very fast -precise -precise -can introduce genes into an organism that would not -can introduce genes into an organism that would not
occur naturally! occur naturally!
Why do it?Why do it?
RiceRice- not high in essential nutrients- not high in essential nutrientsModification:Modification: + daffodil genes and a bacterium = + daffodil genes and a bacterium =
beta-carotene content drastically beta-carotene content drastically increased increased
+ genes from a french bean = double + genes from a french bean = double the iron content.the iron content.
Tomatoes- Introduce genes to Tomatoes- Introduce genes to increase shelf life. increase shelf life.
How is this done?: Transgenic How is this done?: Transgenic tomatoestomatoes
Other applicationsOther applications
Potato - modified to produce a beetle Potato - modified to produce a beetle killing toxin killing toxin
Yellow squash – modified to contain to Yellow squash – modified to contain to viral genes that resistant the most viral genes that resistant the most common viral diseasescommon viral diseases
Develop foods that contain vaccines and Develop foods that contain vaccines and antibodies that offer valuable protection antibodies that offer valuable protection against diseases such as cholera, against diseases such as cholera, hepatitis, and malariahepatitis, and malaria
Canola – modified to resist one type of Canola – modified to resist one type of herbicide or pesticideherbicide or pesticide
A Local ExampleA Local Example::
: GM : GM CanolaCanola
Canadian-Australian RelationsCanadian-Australian Relations
Bayer CropScience produces genetically modified canola in Australia Bayer CropScience produces genetically modified canola in Australia forfor
the Canadian market. It is produced to resist the herbicide “Liberty” the Canadian market. It is produced to resist the herbicide “Liberty”
and can yield up to 20% higher than conventional canola.and can yield up to 20% higher than conventional canola.
Benefits of Genetic Benefits of Genetic Engineering Engineering
and Modifyingand Modifying
1.1. Higher yielding crops, more efficient use Higher yielding crops, more efficient use of land of land
2. Can save money and promote higher 2. Can save money and promote higher profitsprofits
3. Longer shelf life, less waste3. Longer shelf life, less waste Example// Tomatoes from genetically Example// Tomatoes from genetically modified seeds stay fresh modified seeds stay fresh longer.longer.4. Enhanced taste and quality 4. Enhanced taste and quality 5. Reduced maturation time5. Reduced maturation time
Benefits of Genetic Benefits of Genetic Engineering and ModifyingEngineering and Modifying
6. Increased and improved nutrients and stress tolerance6. Increased and improved nutrients and stress tolerance - A single gene genetically engineered into cauliflower can - A single gene genetically engineered into cauliflower can
increase increase production of beta-carotene 100 times. production of beta-carotene 100 times. - A gene can be implanted into a soybean upgrading the soy - A gene can be implanted into a soybean upgrading the soy
protein protein to a quality equal to that of milk.to a quality equal to that of milk. - Corn can be modified to contain its two limiting amino acids, - Corn can be modified to contain its two limiting amino acids, lysine or tryptophanlysine or tryptophan7. Improved resistance to disease or illness7. Improved resistance to disease or illness
- Foods can be enhanced with phytochemicals that help - Foods can be enhanced with phytochemicals that help maintain maintain
health and reduce the risks of chronic disease. health and reduce the risks of chronic disease. 8. Improved crop resistance to disease, pests, weeds and herbicides 8. Improved crop resistance to disease, pests, weeds and herbicides 9. New products and growing techniques 9. New products and growing techniques - “Individuals allergic to milk may be able to buy milk that has - “Individuals allergic to milk may be able to buy milk that has
been been treated with the lactase enzyme” (Whiney, 2002).treated with the lactase enzyme” (Whiney, 2002).
- Creating decaffeinated coffee beans are in a process of - Creating decaffeinated coffee beans are in a process of research. research.
Benefits of Genetic Benefits of Genetic Engineering and ModifyingEngineering and Modifying
SocietySociety Increased food Increased food
security for security for growing growing populations and populations and growth growth challenges challenges
(Human Genome Project Information (Human Genome Project Information (2003), (2003), http://www.ornl.gov/sci/techresourceshttp://www.ornl.gov/sci/techresources/Human_Genome/elsi/gmfood.shtml)/Human_Genome/elsi/gmfood.shtml)
Who Uses this technologyWho Uses this technologyThe Countries that Grow 99% of the
World's Transgenic Crops
69%
23%
7% 1%
USA
Argentina
Canada
China
Risks associated with Genetic Risks associated with Genetic ModificationModification
1. 1. SafetySafety Potential human health implications. Potential human health implications. Potential environmental impact. Potential environmental impact.
Out-crossingOut-crossing Inevitable out-crossing of transgenic plants with naturally Inevitable out-crossing of transgenic plants with naturally
occurring ones.occurring ones. Creation of super-weeds Creation of super-weeds
Creation of biological weapons.Creation of biological weapons.
2. Access and Intellectual Property2. Access and Intellectual Property Domination of world food production by a few Domination of world food production by a few
companies and developing countries.companies and developing countries.
Risks associated with Genetic Risks associated with Genetic Modification – cont.Modification – cont.
3. Ethics3. Ethics ““Playing God” Playing God” Tampering with nature by mixing genes among species.Tampering with nature by mixing genes among species.
4. Labeling4. Labeling Not mandatory in some countries (e.g., Canada and the Not mandatory in some countries (e.g., Canada and the
United States). United States). Mixing GM crops with non-GM confounds labeling attempts.Mixing GM crops with non-GM confounds labeling attempts.
5. Society5. Society New advances may be skewed to the interests of rich New advances may be skewed to the interests of rich
countries.countries. (Human Genome Project Information (2003), (Human Genome Project Information (2003),
http://www.ornl.gov/sci/techresources/Human_Genome/elsi/gmfood.shtml)http://www.ornl.gov/sci/techresources/Human_Genome/elsi/gmfood.shtml)
Risks with GM continued:Risks with GM continued:
Biodiversity Biodiversity Addition of Bt gene into plants including corn, Addition of Bt gene into plants including corn,
potatoes and cotton to increase resistance to potatoes and cotton to increase resistance to plantsplants
Bt gene obtained from Bt gene obtained from Bacillus thuringiensis (a Bacillus thuringiensis (a soil bacterium that produces a natural soil bacterium that produces a natural insecticide) insecticide)
Problem: plants producing Bt toxin are releasing Problem: plants producing Bt toxin are releasing toxin in pollentoxin in pollen
Draper, D. (2002). Draper, D. (2002). Our Environment: A Canadian Perspective 2nd EdOur Environment: A Canadian Perspective 2nd Ed. Scarborough: . Scarborough: Thompson Canada Lmt.Thompson Canada Lmt.
Pollen from a Bt plant was dusted on to Pollen from a Bt plant was dusted on to milkweed:milkweed:
- only 56% of young monarch butterfly larvae - only 56% of young monarch butterfly larvae livedlived
- whereas pollen from organic plants dusted - whereas pollen from organic plants dusted on the milkweed produced a survival rate of on the milkweed produced a survival rate of 100%. 100%.
Approximately half of the monarch butterfly Approximately half of the monarch butterfly population live in the “corn belt” of the USApopulation live in the “corn belt” of the USA
= this new gene could have serious = this new gene could have serious repercussions for this organism repercussions for this organism
Canadian Food Inspection Canadian Food Inspection AgencyAgency
Genetically modified foods are currently Genetically modified foods are currently regulated by the CFIAregulated by the CFIA
works collaboratively with Environment works collaboratively with Environment Canada, Health Canada, and Fisheries and Canada, Health Canada, and Fisheries and OceansOceans
Goal: to ensure that products of Goal: to ensure that products of biotechnology are considered safe to human biotechnology are considered safe to human and animal health and the environment.and animal health and the environment.
According to the CFIA, the assessment According to the CFIA, the assessment process for GE foods is very rigorous process for GE foods is very rigorous
Canadian Food Inspection Canadian Food Inspection AgencyAgency
Assessment processAssessment process
Criticisms of processCriticisms of process
ConclusionConclusion
Genetic Modification:Genetic Modification:
Good or Bad?
Literature Cited:Literature Cited: 1. Canadian Food Inspection Agency. Novel Foods Retrieved April 1, 2002, from the World
Wide Web: http://www.inspection.gc.ca/english/plaveg/pbo/pbobbve.shtml 2. Canadian Food Inspection Agency.(2000) Plant Health and production division, plant
biosafety office on Regulatory directive 2000-07: Guidelines for the environmental release of plants with novel traits within confined field trails in Canada. Retrieved April 4, 2002, from the World Wide Web: http://www.inspection.gc.ca/english/plaveg/pbo/dir/dir0007e.shtml
3. Draper, D. (1998). Our Environment: A Canadian Perspective 1st Ed. Scarborough: Thompson Canada Lmt.
4. Draper, D. (2002). Our Environment: A Canadian Perspective 2nd Ed. Scarborough: Thompson Canada Lmt.
5. Jones, L. (1999, February 27). Genetically modified foods. British Medical Journal. [Journal, Online]. Retrieved April 1, 2002, from the World Wide Web: http://www.findarticles.com/cf_0m0999/7183_318/5417903/print.jhtml
6. Health Canada. Retrieved April 1, 2002, from the World Wide Web: http://www.hc-sc.gc.ca/food-aliment/mh-dm/ofb-bba/nfi-ani/e_novel_foods_and_ingredient.html
7. Health Canada. A Bureau of Food Policy Integration (Food Directorate) Response to: Food Safety of GM Crops in Canada: toxicity and allergenicity: Retrieved April 5, 2002 from the World Wide Web: http://www.hc-sc.gc.ca/food-aliment/mh-dm/ofb-bba/nfi-ani/e_health_canada_response_gmo.html
8. McCalla, D.R. (2000). Why we should proceed cautiously with plant biotechnology? Retrieved April 4, 2002, from the World Wide Web: http://www.canadians.org/ge-alert/
9. Mitchell, B.C. (1997). Resource and Environmental Management 2nd Ed. Harlow: Pearson Education Lmt.
10. Reason Online. Retrieved April 1, 2002, from the World Wide Web: http://reason.com/bi/bi-gmf.shtm
12. Steiner, M. (2000, May 9) Petition to the Auditor General: By the Sierra Legal Defense Fund. Retrieved April 6, 2002, from the World Wide Web: http://www.sierralegal.org/m%5Farchive/2000/pr00%5F05%5F09b.htm
13. Sizer, F., Whitney, E. (1997). Nutrition Concepts and Controversies 713. Sizer, F., Whitney, E. (1997). Nutrition Concepts and Controversies 7thth Edition. Edition. Waltsworth publishing Company: Belmont Ca.Waltsworth publishing Company: Belmont Ca.
14. Whitney, E.N., Rolfes, S.R. (2002). Understanding Nutrition. 914. Whitney, E.N., Rolfes, S.R. (2002). Understanding Nutrition. 9thth Ed. Wadsworth Group: Ed. Wadsworth Group: Belmont Ca. Belmont Ca.
15. http://allergies.about.com/library/blificbio.htm15. http://allergies.about.com/library/blificbio.htm 16. Human Genome project(2004).: 16. Human Genome project(2004).:
http://www.ornl.gov/sci/techresources/Human_Genome/elsi/gmfood.shtmlhttp://www.ornl.gov/sci/techresources/Human_Genome/elsi/gmfood.shtml 17. Bayer CropScience (2004).
http://www.bayercropscience.com/bayer/cropscience/cscms.nsf/id/OurCustomers