Cell Cycle

AP Biology· difficulty 2/5

Sister chromatids are

A
$Homologous chromosomes inherited one from each parent$
B
$Different chromosomes carrying entirely unrelated genes$
C
$Fragments of unrelated DNA joined at random sites$
D
$Identical copies of a chromosome joined at the centromere, produced by DNA replication$
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Explanation

After S phase, each chromosome consists of two identical sister chromatids; they separate during anaphase of mitosis (or anaphase II of meiosis).

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