CHEN 1000 Biotech Lecture 7 Notes

CHEN 1000 Biotech Lecture 7 Notes - Ag Biotech Pros &...

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1 Ag Biotech Pros & Cons Pros : • Increased crop value and efficient land-use • Improved nutritional value • Reduced use of chemical herbicides and pesticides Cons : • “Unnatural” to introduce bacterial genes into food. • Introduction of new allergens (some instances have occurred) • Popularity of GM crops could lead to reduced diversity • Potential environmental effects: •Bt crops could damage migratory insect populations •HT genes could spread to native plants not apparent yet CLONING CLONING What is a clone? What is a clone? • An individual created through asexual reproduction from the same original individual. – Genetically identical Clicker Question Which of the following is NOT an example of cloning? A: growing a plant from a cutting B: the birth of twins C: growth of a bacterial colony via cell division Three types of cloning • Embryo cloning • Adult DNA cloning • Therapeutic cloning Making a baby, the basics and stem cells…. .
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2 • This is a medical technique which duplicates the process that nature uses to produce identical twins or triplets. • One or more cells are removed from a fertilized embryo (after in vitro fertilization) and encouraged to develop into one or more duplicate embryos. • Twins or triplets are thus formed, with identical DNA. This has been done for many years on various species of animals. Embryo Cloning • In the case of the sheep "Dolly", a cell was taken from the mammary tissue of a mature 6 year old sheep. • It was fused with a sheep ovum (unfertilized) which had had its nucleus removed.
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This note was uploaded on 05/01/2008 for the course CHEN 1000 taught by Professor Degrazia,j during the Spring '04 term at Colorado.

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CHEN 1000 Biotech Lecture 7 Notes - Ag Biotech Pros &...

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