Why do farmers choose the cows with the highest milk yield to breed together?

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Question

Why do farmers choose the cows with the highest milk yield to breed together?

Accepted Answer

Their offspring are more likely to inherit a high milk yield — Award 1 mark. Milk yield is partly controlled by genes, so pairing high-yielding parents makes those alleles more likely in the calves, and repeating this each generation steadily raises the herd's yield. Breeding does not change the parents' own output, it does not prevent disease, and growth rate is a separate characteristic.

Answer

It makes the calves grow faster than wild cattle

Answer

Breeding them prevents disease in the herd

Answer

Their offspring are more likely to inherit a high milk yield

Answer

Breeding makes the parents produce more milk

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