Genetic Engineering

tanktherapistBiotechnology

Oct 23, 2013 (3 years and 9 months ago)

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Genetic Engineering

What Is This?




Do you hear what I hear?

Selective Breeding


Allowing only those animals with
desired characteristics to produce
the next generation


Humans use selective breeding to
pass desired traits on to the next
generation of organisms


Inbreeding
-

develop pure lines


Hybrid
-

usually bigger and
stronger

Examples of Selective Breeding

Genetic Engineering


Transgenic organisms contain
recombinant DNA (foreign DNA)


3 Step Process


1. Isolate
-

cleave via restriction
enzymes


2. Attach


“sticky ends”


3. Transfer


vector, usually
bacterial DNA

Tobacco with “Firefly DNA”


Gel Electrophoresis

DNA Sequencing


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Applications of DNA Technology or
Biotechnology


Cloning


Recombinant DNA in technology,
medicine, and agriculture


Transgenic organisms


Gene therapy


Sheep alpha
-
1 antitrypsin for
treatment of emphysema


Goats CFTR protein for treatment
of Cystic Fibrosis

Transgenic Animals


Transgenic livestock have been
produced with extra copies of growth
hormone genes


Such animals grow faster and produce
meat that is less fatty than that from
ordinary animals


Efforts are now underway to produce
transgenic chickens that will be
resistant to the bacterial infections that
sometimes cause food poisoning


Transgenic Plants


(2000) 52 % of the soybeans and 25 %
of the corn grown in the United States
were transgenic


Many contain genes that produce a
natural insecticide, so the crops do not
have to be sprayed with synthetic
pesticides


Others have genes that enable them to
resist weed
-
killing chemicals

Cloned Animals

Gene Therapy


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