What's a Sister Chromatid?

A sister chromatid refers to the identical copies 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.

What are sister chromatids simple definition?

Medical Definition of sister chromatid

: either of the two identical chromatids that are formed by replication of a chromosome during the S phase of the cell cycle, are joined by a centromere, and segregate into separate daughter cells during anaphase.

What are sister chromatids and non sister chromatids?

Non-sister chromatids are chromatids of homologous chromosomes. ... To summarize: Sister chromatids are the duplicated chromosome itself, they contain the exact same alleles. Non-sister chromatids are the chromatids of the homologous chromosome, they may contain different alleles.