Transgenic species! (1 Viewer)

[Taylorcopesac]

got an assignment due 2morrow and need urgent suggestions of genetically modified plants and animals

this is the question

investigate the potential impact of the use of reproductive technologies on the genetic diversityof species using a named plant and animal example that have been genetically altered.

so i need sources that disscuss the impacts on the modifications.

thanks for reading and for any help

 

[xiao1985]

good impact help us in certain ways (say sheep which produces milk that helps with cystic fibrosis)

bad impact - reduce biodiversity/gene pool, may introduce lethal diseases to the population

 

[yosemite sam]

Ligers can't breed because theyre genetically imperfect.

 

[.x.Cookie.x.]

For future reference.
Reproductive technologies -

• Artificial insemination
• Artificial pollination
• Cloning

Bt Cotton has been genetically engineered to produce a natural insecticide that comes from a common soil bacterium, Baccilus thuringiensis. By using this type of cotton, that produces its own insecticide to kill insect pests, farmers spend much less on pesticides and the environment is protected aswell. The toxin made usuing the Bt gene is also environmentally friendly because it kills only Heliothis and closely related species. Loss of genetic diversity.

Canola is grown for food oil. It is a preferred species for biotechnology because it is easy to introduce genes into it using Agrobacterium and it can be propagated from one cell (micropropagation). In Canada, transgenic canola oil is produced from herbicide resistant plants. There are many other trials to develop new products using transgenic canola. Once again loss of genetic diversity.

OncoMouse have been developed to be used in cancer research. These mouse have been genetically engineered to always develop breast and lymph cancer and die of these human cancers within 90 days. They are used worldwide to test new cancer drugs and therapies. Unethical to breed an animal so that it will die.

Polly is a transgenic sheep. She has been engineered to produce a human protein that makes blood clot. This will be useful for haemophiliacs. The idea is that the sheeps milk will contain the clotting factor this can be harvested.

 

[rooeys2]

lol get urself a success one bio book and read the model answer or read the txtbook if you were bothered enough its all in there

 

[beentherdunthat]

Success one is good. But it will only get you so far. You have to make sure to go over your syllabus points, and write answers to them. I STRONLY RECOMMEND Downloading these notes http://community.boredofstudies.org/showpost.php?p=3042404&postcount=21

· Discuss the potential impact of the use of reproductive technologies on the genetic diversity of species using a named plant and animal example that has been genetically altered:
– The main fear behind the use of genetic and reproductive breeding techniques on organisms is that the natural diversity and variation within populations is decreased
– E.g. cotton plants. The main crop being grown all over the world is BT cotton.
– As more and more farmers shift from natural cotton to BT cotton, there are many disadvantages:
§ Many natural varieties of cotton will be lost
§ The species itself becomes vulnerable to extinction. If all cotton grown all over the world is BT, and a disease appears, that kills specifically BT cotton, than there is a risk of cotton becoming an extinct organism
– In another case, a population of cattle that have all been fathered by the same bull, through artificial insemination techniques, is at risk of environmental changes
– A lack of variation is a major risk factor in extinction of a species.
And further...
§ ADVANTAGES: In agriculture, cloned plants have identical requirements and grow in similar ways to produce similar yields at the same time. In plants and animals identical copies of desirable varieties can be produced
§ DISADVANTAGES: In crops – all plants susceptible to the same diseases. Cloning is expensive with limited advantages over reproductive techniques. Cloning of animals has raised ethical questions about the cloning of humans. The health/life expectancy of cloned animals is questionable, with the death of Dolly the sheep being earlier than expected.