Answer: PATERNITYTESTS

Paternity tests refer to genetic tests that are conducted to determine the biological relationship between a father and a child. These tests compare the DNA of the alleged father and the child to establish paternity. In the given context, "Things that can really make someone pop" is likely a play on words, possibly referring to the surprising or unexpected results that can be revealed through paternity tests.

Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Pop quizzes?. Explanations are generated by AI and may be inaccurate.