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

·         Desired->> milk yield. 50ml for some cows, 150ml for some cows but most cows produce 100 ml of milk.

·         Farmer collects all milk but leave the 150ml for breeding cows.

·         New generation produce 100ml, 150ml and 200ml of milks.

·         Cows produce high yield become breeding population so, they are selected.

·         Next generation produce 150ml, 200mll and 250ml. develop desired characteristic by selective breeding which is milk yield=genetic genes.