Topic: Mechanism: variation, mutation, recombination, natural selection· Genetics and Evolution
Artificial selection to obtain cows yielding higher milk output represents :
1. directional as it pushes the mean of the character in one direction.
2. disruptive as it splits the population into two, one yielding higher output and the other lower output.
3. stabilizing followed by disruptive as it stabilizes the population to produce higher yielding cows.
4. stabilizing selection as it stabilizes this character in the population.