Selective breeding and GM
These are the steps in selective breeding:
Producing disease-resistant wheat by crossbreeding wheat plants with disease resistance and wheat plants with a high yield.
Increasing milk yield by selecting bulls from high yield herds and breeding them with cows that have the best milk production.
Selective breeding can also be used to modify other characteristics of cattle.
Future generations of selectively bred organisms will all share very similar genes. This could make some diseases more dangerous as all the organisms would be affected. Also there's increased risk of genetic disease caused by recessive genes.
Some genes would be lost, making it more difficult to produce new varieties in the future. In scientific language this would be described as ‘inbreeding can lead to a reduction in the size of the gene pool’.
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