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Advances in Genetics
Mrs. Wharton’s Science class
Genetic Advances
Selective breeding, cloning and genetic
engineering are 3 methods for developing
organisms with desired traits
Selective breeding
The process of selecting organisms with
desired traits to be parents of the next
Involving crossing 2 organisms that have
similar characteristics
To produce offspring with specific traits (
 Can also increase the likelihood that
organisms may inherit alleles that lead to
genetic disorders
Breeders cross genetically different
ie- a farmer may cross corn that produces
many kernels with corn that is resistant to
 An
organism that is genetically
identical to the organism from
which it was produced
Genetic Engineering
Genes from one organism are transferred
into the DNA of another organism
 Splicing- improve food production plants
so more can be grown with less
Traditional plant breeding- selecting and
crossing plants of the same kind with certain
 Gene splicing- involves splicing or cutting in of
genes from an entirely different plant
How Does Gene Splicing Affect
Being used in foods we already eat- gov’t
said these foods do not need to be labeled
(peanut allergies?)
 Soybean seeds- not sure of long-term
effects ( soy is most widely used plant in
the world)
Terminator Wheat
Grows well- produces good harvest
 Farmers have to buy more each year- it
does not reproduce each year
Gene Therapy
When working copies of a gene may be
inserted directly into the cells of a person
with a genetic disorder