Multiple Choice
During mitosis, sister chromatids are ______.
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9. Mitosis and Meiosis
Mitosis
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After DNA replication during mitosis, what does each individual chromosome become?
A
A homologous pair of chromosomes
B
A tetrad
C
A single chromatid
D
A pair of sister chromatids joined at the centromere
Verified step by step guidance1
Recall that before DNA replication, each chromosome consists of a single chromatid.
During DNA replication, the DNA molecule is duplicated, resulting in two identical chromatids called sister chromatids.
These sister chromatids remain attached at a region called the centromere, forming a single replicated chromosome.
Understand that a homologous pair consists of two chromosomes, one from each parent, which is different from sister chromatids that are identical copies of the same chromosome.
Therefore, after DNA replication, each individual chromosome becomes a pair of sister chromatids joined at the centromere.
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