A similar problem to your/you‘re where one is a contraction and the other signifies possession.
Who‘s is really who is, the apostrophe indicates that an i is missing:
e.g. “Who‘s that gorgeous girl over there?” (Who is that gorgeous girl over there?)
Whose means “belonging to the person”: e.g. “Dan, whose eyes were bloodshot, hadn’t slept well.”
Whose is a possessive pronoun. e.g. whose cat, whose iPod, etc.
Who’s is normally misused in questions such as:
“Who‘s bag is this?”
It should, of course, be “Whose bag is this?”
Type the missing words from the following sentences in the comments section below:
1- __________ coming to the shops with me?
2- She wanted to know __________ bags they were.
3- I opened the curtains so I can see __________ coming to the door.
4- __________ coming to dinner tonight?
5- __________ plate is this?