Final answer:
The appropriate biotechnology technique for the scenario is artificial insemination.
Step-by-step explanation:
The appropriate biotechnology technique for the scenario of a farmer wanting to increase the size of her dairy herd without buying a bull is artificial insemination. In artificial insemination, semen from a selected bull is collected and inserted into the female cow's reproductive tract, bypassing the need for natural mating. This allows the farmer to control the genetics of the offspring without the expense of purchasing a bull.
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