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Artificial Selection
Artificial selection is an evolutionary process in which humans select for or against particular features in organisms. For example, when a farmer breeds only the most muscular creatures, each generation becomes meatier. Consider Belgian blue cattle. They have been bred for their meat.
Domestication of the Fox
Domestication of the Fox
When man breeds foxes for tameness, the result is a very dog-like fox in relatively few generations.
Samurai Crab
Samurai Crab
In the year 1185, a 6-year old Japanese Emperor was drowned during a war.
Since that time, fishermen threw back crabs whose carapace (shell) looked like a human face. Those crabs with the most human features were spared, and today Heiki Crabs have a carapace with the image of an angry Samurai Warrior. This is an example of artificial selection.
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