Genetic Engineering


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


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


develop pure lines


usually bigger and

Examples of Selective Breeding

Genetic Engineering

Transgenic organisms contain
recombinant DNA (foreign DNA)

3 Step Process

1. Isolate

cleave via restriction

2. Attach

“sticky ends”

3. Transfer

vector, usually
bacterial DNA

Tobacco with “Firefly DNA”

Gel Electrophoresis

DNA Sequencing


Applications of DNA Technology or


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

Others have genes that enable them to
resist weed
killing chemicals

Cloned Animals

Gene Therapy

Biologix_Manipulating DNA.asx