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

Example Input: The majority of human genes have two or more possible alleles.
Example Output: How many possible alleles do the majority of human genes have?

Example Input: Breast cancer is the most common type of cancer in adult females.
Example Output: What is the most common type of cancer in adult females?

Example Input: Population is the unit of evolution.
Example Output:
What is the unit of evolution?