what is the difference between 2nd cousin and 1st cousin once removed

Question

what is the difference between 2nd cousin and 1st cousin once removed

In: Biology

Answer 1

First cousin – One of my grandparents is also one of your grandparents.

Second cousin – One of my great grandparents is also one of your great grandparents (but we don’t share a grandparent).

First cousin once removed – One of my grandparents is one of your great grandparents, or vice versa. (“Once removed” means that you’re one generation apart)