Q: When does a joke turn into a “dad” joke?
A: When the answer is a parent!

Explanation: There is a category of jokes called dad jokes.  These are jokes that have really bad answers that will make you groan because they are stupid/silly.  Puns fit nicely into this category.  I rather like theses jokes.  By the way, the answer to a joke is also called a punchline.

The word “apparent” (meaning obvious, clear) sounds just like “a parent” (meaning a mom or dad).

This joke is funny because it plays with the word apparent/a parent.  When you become a parent, you become a mom or a dad; when something becomes apparent it becomes clear, like the answer to a question.

Here are some kids telling dad jokes.  They’re awesome!