what are sister chromatids pls explain with diagram?

Sister chromatids : Sister chromatids are two daughter strands of a single replicated chromosome. They are connected by a centromere. The information they carry will be exactly same.

•  Sister chromatids are identical to each other
• During S phase of the cell cycle the DNA is replicated and an identical copy of the chromatid is made. These two chromatids are then called sister chromatids..