Genetics is a weird thing and can go one of two ways. Sometimes, people look nothing like their parents and can even question whether they are genuinely related to them. But other times, family genes are so strong that looking at a picture of your parents or grandparents at the same age as you can feel like you're looking in the mirror. A Twitter user felt precisely this when she compared a picture of herself and her grandma, remarking that "Grandma's genes really hit copy n paste huh," which inspired others to show how much they look like their own family parents, grandparents and children. Here are some of the most uncanny resemblances that were submitted.