S is for Sister Chromatids
Sister chromatids are two identical chromosomes attached to each other at the centromere. Since they are identical, they carry exactly the same genes. So what's the point of having two identical chromosomes attached to each other? This is the body's way of making more cells. When it undergoes mitosis the DNA needs to replicate itself so the new daughter cell will have the same amount of genetic material.
Sister chromatids are two identical chromosomes attached to each other at the centromere. Since they are identical, they carry exactly the same genes. So what's the point of having two identical chromosomes attached to each other? This is the body's way of making more cells. When it undergoes mitosis the DNA needs to replicate itself so the new daughter cell will have the same amount of genetic material.
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