5.11 understand that animals with desired characteristics can be developed by selective breeding

Notes


Breeding shifts the distribution curve towards the desired characteristic.

-> Example: Cows milk yield
Gen 1
Cow A: 50 ml
Cow B: 100ml
Cow C: 150ml
-> Cow C is chosen to be the 'breeding cow' - the cow is selected to be the breeding population to develop the desired characteristic.


Gen 2

Cow A: 100 ml

Cow B: 150ml

Cow C: 200ml

-> -> Cow C is chosen to be the 'breeding cow' - the cow is selected to be the breeding population to develop the desired characteristic.

Etc.

NOTE: For selective breeding to take place, the desired characteristic MUST under the control of the genes