If desirable traits (genes) are accumulated,what increases?

State the role of heredity and historical background.

Which of the following statements are the main objectives of animal breeding?
$I$. Improved growth rate
$II$. Increased production of milk,meat,egg,wool,etc.
$III$. Superior quality of milk,meat,eggs,wool,etc.
$IV$. Improved resistance to various diseases
Choose the correct option.

Animal husbandry deals with
$I$. Breeding of livestock like buffaloes,cows,sheep,camels,etc.,that are useful to humans.
$II$. Rearing,catching,selling,etc.,of fish,molluscs,and crustaceans.
$III$. Breeding of fowls for human use.
Which of the statements given above are correct?

Which of the following measures is taken to realize the yield potential of cattle?

Which of the following points is $NOT$ associated with the management of the dairy industry?