Evolution: Natural selection and human selection article
What is evolution?
- natural selection
- genetic drift, and
- gene flow
Natural selection - one of the mechanisms of evolution
An example of natural selection at work - antibiotic resistance
What is artificial selection or selective breeding?
An example of artificial selection - Dog breeding
- Purebred is a type of dog that comes from a lineage of the same dog breed and that has never mated with another breed. For example, a purebred german shepherd is all german shepherd and nothing else.
- A cross-breed dog is a dog that was the offspring of two different types of purebreds. Let’s say your purebred german shepherd mated with a purebred husky. The resulting offspring would be a cross-breed of half german shepherd, half husky.
- Finally, mixed-breeds are a combination of multiple breeds, where their parents were not purebreds. There are too many possible combinations to count!