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

Input: Consider Input: Meiosis is part of the process of gametogenesis, which is the production of sperm and eggs.

Output: Meiosis is part of the process of gametogenesis, which is the production of what?

Input: Consider Input: The sum of the masses of the atoms in the formula is referred to as molecular mass.

Output: The sum of the masses of the atoms in the formula is referred to as what?

Input: Consider Input: A concave lens is thicker at the edges than it is in the middle.
Output: What type of lens is thicker at the edges than it is in the middle?