Selective Breeding

Microevolution

________ occurs on a small scale within a species.

Humans

________ select the animal or plant with the best characteristics and try, through genetic crosses, to create a breed or plant line that retains these desired characteristics.

Natural selection

________ occurs when populations have genetic variations.

natural selection

As with ________, variation is the key to selective breeding.

Natural selection

Natural selection occurs when species have variation and certain traits are selected because they help the species to reach a reproductive age and pass on their genes

Selective breeding

A form of artificial selection in which organisms with certain characteristics are chosen by humans because they are of some benefit

Breeding of crops to be disease

or cold-weather-resistant in order to increase production