Sister Chromatids
Definition
Sister chromatids are identical copies of a single chromosome that are connected by a centromere. They are created during the S phase of interphase and later separated during anaphase.
Analogy
Consider sister chromatids as twins holding hands. They're identical because they come from the same parent (chromosome) and they hold hands at their center (centromere). When it's time for them to go to different schools (anaphase), they let go of each other's hand and move apart.
Related terms
Chromosome: This is a long DNA molecule with part or all of the genetic material of an organism.
Interphase: The stage in the cell cycle where the cell grows, replicates its DNA, and prepares for division.
Centrosome: An organelle near the nucleus of a cell that contains the centrioles (in animal cells) and from which spindle fibers develop in cell division.
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