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When do strands of DNA form chromosomes?

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Please explain the following questions:

1) When do strands of DNA form chromosomes?
2) What is a replicated chromosome? How does this differ from a chromosome pair?
3) Is a cell containing replicated chromosomes haploid, diploid, or neither? Why?
4) Why is anaphase unique in terms of chromosome number?

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1) When do strands of DNA form chromosomes?
Strands of DNA form chromosomes during prophase. This is the first phase of mitosis and follows interphase. At the beginning of prophase, the loose strands of DNA start to condense, getting thicker and thicker, until they can be clearly seen as separate and distinct structures, i.e. chromosomes

2) What is a replicated chromosome? How does this differ from a chromosome pair?
A replicated chromosome is one in which there are two copies of the chromosome joined together at the centromere. It forms after S phase, the part of ...

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