Applied Genetics Ch. 24Applied Genetics Ch. 24

How the Principles of Genetics are used.

How have humans applied How have humans applied Genetics?Genetics?

People have bread plants and animals for specific desirable traits for thousands of years.

Selective breeding is the crossing of plants and animals with desired characteristics to produce offspring with those characteristics.

Other cases of Selective Other cases of Selective BreedingBreeding

Disease resistant plants such as corn and wheat.

Variations of flowers for color or shape

Bigger, leaner livestock

How is a Hybrid produced?How is a Hybrid produced?

Sometimes breed offspring with two or more desired traits

Hybridization is the crossing of two different but related species.

Ex. Mule (horse/donkey)Beefalo

Mule Beefalo

Some plants offspring are Some plants offspring are bread together?bread together?

Some desired traits are amplified by inbreeding offspring of the same species.This could make a desired trait more

prominent, but will not allow new genes to enter the species.

Where is the future of Where is the future of Genetics?Genetics?

Genetic Engineering is the process in which genes or pieces of DNA are transferred from one organism to another.

Combining DNA from one organism with the DNA of another.

This process is called recombinant DNA

Recombinant DNARecombinant DNA

How does it happen?How does it happen? Usually a gene from a higher organism is placed

into to a lower organism. Human genes have been inserted into bacteria

and yeast to produce certain proteins. Ex. Insulin A gene is usually inserted into a ring of DNA

from bacterial called a plasmid. When the plasmid is placed in a bacteria the

bacteria will produce the protein coded in the plasmid.

Genetically Engineered Genetically Engineered ProductsProducts

MedicineInsulin, Growth Hormone, Vaccines, interferons

More Genetically More Genetically Engineered ProductsEngineered Products

AgricultureCrops that fight

diseaseFreeze resistant

crops

Cloning is apart of Genetic Cloning is apart of Genetic EngineeringEngineering

Monkeys, sheep, and bacteria have already been cloned.

Should humans or parts of humans?

                           

Is Genetic Engineering Is Genetic Engineering Right?Right?

Arguments ForNew medical

breakthroughsSave livesLimit suffering

from disease

Arguments AgainstIt is “playing God”!We are messing

with nature.It may lead to a

supreme race.

Web TaskWeb Task

Run a web search for information on genetic engineering.

Then in Microsoft Word, summarize two of the sites you found. Remember to give the addresses.

Once done with the summaries, give your opinion on genetic engineering and support it.

Save your paper to a disk and hand it in. Make sure your name is in the file name.

Task Scoring RubricTask Scoring Rubric

5points for each site summarized in a complete well written paragraph.

5points explaining your opinion of genetic engineering.

5points for supporting your opinion with facts from sites or from the presentation.

Total of 20 points as a quiz grade.