I think selective breeding occurs when you want to create something new by mixing two things together. In other words, if you want a strange looking small, loud and powerful dog, you would use a male or female Chihuahua with like a pitbull. This would give birth to a strange hybrid of the two. That is selective breeding cause you 'selected' characteristics that you wanted in the new species.
Cloing, on the other hand, occurs when you desire an exact replica of what already exists. Say you love your pet Chihuahua and he gets hit by a car and has only a few moments to live. If you want an exact duplicate,you will then have to clone or photocopy the dog exactly to what it was before. The only real difference is that in cloning, you can actually remove parts of the dog that you didn't want like a certain gene that causes certain ailments that will make the dog sick and in pain, stuff it can live without but that won't change it's physical appearance from what was before.
Powered by Yahoo Answers