Keyword Analysis & Research: sister chromatids

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What do sister chromatids have in common?

A sister chromatid refers to the identical copies (chromatids) formed by the DNA replication of a chromosome, with both copies joined together by a common centromere. In other words, a sister chromatid may also be said to be 'one-half' of the duplicated chromosome. A pair of sister chromatids is called a dyad.

Do sister chromatids have same genes?

Sister chromatids have the same genes and the same alleles. During the S subphase of the interphase period, a full set of sister chromatids are produced when the entire cell’s DNA is duplicated. During a mitotic cellular division, identical chromatid pairs are divided into two dissimilar cells.

What structure holds sister chromatids together?

The centromere holds the two sister chromatids together in a replicated chromosome. It is a region on a chromosome that consists of centric heterochromatin. The centric heterochromatin is flanked by pericentric heterochromatin.


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