Bovine Growth Hormone (BGH) is a hormone produced naturally in the bodies of cows and controls calf growth and milk production. Cows injected with this hormone can produce more milk than cows that do not receive hormone injections. In the 1980's, the gene for BGH was inserted into E. coli bacteria. These genetically engineered bacteria then produce the hormone like small factories so BGH can be injected into cows regularly.
Pause & Reflect
Do you think you have the right to know what substances are in the food you eat, or how your food is produced? Would you buy milk produced by genetic engineering? Why or why not? Would you pay more for milk that was not produced in this way? Write your responses in your Science Log and we will discuss it in class next week.
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