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In metaphase, sister chromatids align along the metaphase plate at right angles to the cell poles. In anaphase, sister chromatids separate and begin moving toward opposite ends of the cell. Once the paired sister chromatids separate from one another, each chromatid is considered a single-stranded, full chromosome. In telophase and cytokinesis, separated sister chromatids are divided into two separate daughter cells. Each separated chromatid is referred to as a daughter chromosome.
Sister chromatids (with -tid at the end), are two identical (= exactly the same) parts (Chromatids) arising from replication of a chromosome. (In the figure here next the sister chromatids A1 and A2 are an exact copy of each other, as well as the set B1 and B2, whereas homologs A's and B's show small differences).