This question already has an answer here:
I'm not sure whether to put is (number agreeing with the singular her whole family) or are (number agreeing with plural biologists) in this sentence:
Her whole family is/are biologists.
After some more searching, it seems to make it correct, the whole would need to be removed.
Based on this other question, I think "Her family are biologists." is technically correct but "All of her family are biologists sounds better."
Still not certain.