A farmer selectively breeds cattle for high milk yield. Which pair should be crossed?

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Question

A farmer selectively breeds cattle for high milk yield. Which pair should be crossed?

Accepted Answer

A bull whose mother had a high yield with a high-yielding cow — Bulls do not produce milk, so their breeding value is judged from female relatives. Choosing on the wrong characteristic wastes generations.

Answer

Two animals from unrelated species

Answer

A bull whose mother had a high yield with a high-yielding cow

Answer

The two largest animals regardless of yield

Answer

The two oldest animals in the herd

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