$A$ mule is an offspring of

Which one of the following is $INCORRECT$ regarding crossbreeding?

$A$ superior female,in the case of cattle,is the $A$ that produces more milk per lactation. On the other hand,a superior $B$ is that $C$ which gives rise to $D$ as compared to those of other males. Here $A$ and $D$ refer to:

What does a reduction in fertility and productivity of animals indicate?

Cross breeding:
$I$. Refers to the cross of a superior male of one breed with a superior female of another breed.
$II$. It helps to accumulate the desirable genes of the two breeds into a progeny.
$III$. The progeny may be used for commercial production.
Which of the statements given above are correct?

Artificial insemination is advantageous because