Represents two things that are identical, Biology

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Which of the following represents two things that are identical?

a.Two alleles for the same gene in a homologous chromosome pair.

b.The sequences of DNA in the two sister chromatids of a chromosome before meiosis I.

c.The sequences of DNA in the two sister chromatids of a chromosome after meiosis I.

d.The number of homologous chromosomes per cell before and after meiosis I.


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