Question

what are a & b called, and what is true about the dna found making up each?
options:
sister chromatids, the dna in each is identical
sister chromatids, the dna in each is not identical
daughter chromatids, the dna in each is identical
daughter chromatids, the dna in each is not identical

Explanation:

In cell biology (subfield of Biology, Natural Science), during DNA replication, a chromosome (like the X - shaped one here) consists of two sister chromatids. These sister chromatids are formed by the replication of a single DNA molecule, so the DNA in each sister chromatid is identical. The term "daughter chromatids" is not the correct term used; it's "sister chromatids". So the correct option is the one that says sister chromatids with identical DNA.

Answer:

A. sister chromatids; the DNA in each is identical