sister chromatid

noun

plural sister chromatids
: 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
The name cohesin is derived from its function in maintaining the cohesion of sister chromatids after DNA replication; this ensures their faithful segregation into daughter cells during mitosis.Science

Word History

First Known Use

1914, in the meaning defined above

Time Traveler
The first known use of sister chromatid was in 1914

Dictionary Entries Near sister chromatid

Cite this Entry

“Sister chromatid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sister%20chromatid. Accessed 27 Feb. 2024.

Medical Definition

sister chromatid

noun
: 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
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