Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: A bow wake is created when the wave source moves faster than the wave propagation speed.

Answer: What is created when the wave source moves faster than the wave propagation speed?

Question: The energy stored in the organic molecules of food ultimately comes from the sun.

Answer: The energy stored in the organic molecules of food ultimately comes from where?

Question: An allele that's always expressed over another is a dominant allele.

Answer:
What's the term for an allele that's always expressed over another?