Chapter 9 Section 4
Genetic Screening
Test DNA to detect genetic diseasesdetermines risk of having
or passing on a geneticdisorder
can detect some genesknown to cause geneticdisorders
Gene Therapy
Gene Therapy - the replacement of faulty genesAttempts to replace defective or missing
genes or add new genes to treat a disease.
Gene Therapy
Still in the experimental stages Some issues:
Inserting gene into correct cell/all cellsDetermining effect on other genesImmune system may respond causing
inflammation
First cloned dog
Cloning Entire organisms can be cloned
Clone- genetically identical copy of gene or of an organism
Some simple animals can essentially clone themselves by regeneration○ Ex. Sea Stars
Cloning Process In mammals- scientists swap DNA between cells
1. Unfertilized egg taken from animal
2. Eggs nucleus (DNA) removed
3. Nucleus (DNA) of animal to be cloned is implanted into egg
4. After embryo grows for a couple days it is transplanted into female
Cloning brainpop
Dolly the Sheep Dolly became first
cloned mammal from using an adult cell. Led to cloning of pigs,
dogs and miceClone may not look
like original (many factors influence expression of gene- i.e. environment)
Dolly the Sheep brainpop
Benefits of Cloning Human organ
transplants Save endangered
species Bring back extinct
species??
Jurassic Park Clip
Concerns of Cloning
Low success rate Clones less healthy than original Ethical controversy
Destruction of embryos for stem cells
Word Def Picture
Genetic Screening
Gene Therapy
Clone
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