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Before DNA replication, how many molecules of DNA make up a chromosome?
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Before DNA replication, how many molecules of DNA make up a chromosome?

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Answer:

Figure 7 The number of DNA molecules in a chromosome: (a) a chromosome prior to replication contains a single DNA molecule; (b) a chromosome that has been replicated and consists of two chromatids, each comprising a single DNA double helix molecule.

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User VDV
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