Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Example Input: An allele that's always expressed over another is a dominant allele.
Example Output: What's the term for an allele that's always expressed over another?

Example Input: The outer layer of the sun is made up of plasma.
Example Output: What is the outer layer of the sun made up of?

Example Input: Nitrate levels and turbidity factors can have the greatest effect on the health of a river system.
Example Output:
Which factors can have the greatest effect on the health of a river system?