5.11- Breeding Animals

Understand that animals with desired characteristics can be developed by selective breeding.

Using Cow as an example, the desired characteristic is milk yield.

• Some cows produced 50ml or 150 ml of milk but most cows produced 100 ml
• The farmer will collect all the milk
• The farmer chooses the 150ml milk cows as his breeding cows
• In the next generation, 
• Some cows produce 100ml or 200 ml of milk but most cows produce 150 ml
• He will then select the 200ml cows for breeding

Milk yield must be genetic for this to work.