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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