CB4d Breeds And Varieties Flashcards
Artificial selection
When humans choose certain organismsfor breeding because they have useful characteristics
Selective breeding (definition)
When humans choose an organism with a certain charcteristic and breeds more of these organisms until that chosen characteristic is more obvious
Suggest two characteristics a cow breeder might select for
Size (more beef produced)
Amount of milk able to produce
Plants and animals are often selectively bred for:
Disease resistance How much useful product thy make (yield) Coping with environment conditions Fast growth Flavour
Genetic engineering
Altering the genome of an organism, usually by adding genes from another species.
Genetically modified organisms
An organism that has its genome artificially altered
Positive of Genetic engineering
Faster than artificial selection
Negative of genetic engineering
More expensive than artificial selection
Golden rice is a GMO with two genes inserted into its genome, one from a daffodil and one from a bacterium. They allow the rice to produce…
beta carotene in its grain
Humans need Beta-carotene to make…
Vitamin A
Lack of vitamin A causes…
Blindness and can cause death because the immune system doesn’t work properly
Golden rice was created in hope that farmers in
poorer parts of the world where Vitamin A deficiency is a problem could be grown
GM pigs are being developed with human-like organs to use…
in organ transplants
