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

Just as salty taste involves perception of sodium ions in saliva, sweet taste correlates with presence of glucose.
Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose?

Lipids are available to the body from three sources.
Lipids are available to the body from how many sources?

Pedigree is utilized to analyze simple mendelian inheritance.

What is utilized to analyze simple mendelian inheritance?