“Take after” is a phrasal verb, meaning to look or behave like an older relative. Each of your parents gave you some of their physical and personality traits, but sometimes you don’t look like any of them. You take after your grandmother or grandfather instead.
“Like chalk and cheese“ is an idiom that you can use to express how two people are completely different from each other. For example, when someone asks you “Do you take after any member of your family?”, you might answer “No, not really. My sister/brother and I are like chalk and cheese.”
- Do you take after your parents, Demi? – No. I take after my grandma actually.
- Even though they are twins, their personalities are like chalk and cheese.