안녕하세요!

음.. if we are talking about what happens in meiosis 1 alone,

it'll be more correct to refer to sister chromatids as chromatids at that point.

chromatids와 chromosome을 쉽게 구분하는 방법은

가운데 centromere 부분을 보면 돼요.

chromatids라고 불릴때는 

replicated chromatids are still attached at the centromere.

만약 여기가 분리되어서 각각 독립적으로 존재하기 시작할땐

그때 we start referring them as chromosomes.

meiosis 1 telophase 상태에선 sister chromatids still attached together at the centromere region

move to opposite ends of the cell, 

because meiosis 1 is when homologous chromosomes separate,

meiosis 2 is when sister chromatids separate.

이해가 되나요?

열공하시고 혹시 또 질문이 생기면 게시판에서 만나요! :D