S phase

American  

noun

Cell Biology.

1. the period of the cell cycle prior to mitosis, during which the chromosomes are replicated.

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Etymology

Origin of S phase

First recorded in 1940–45

Example Sentences

During DNA duplication in the S phase, each chromosome is replicated to produce two identical copies, called sister chromatids, that are held together at the centromere by cohesin proteins.

From Textbooks • Jun. 9, 2022

DNA replicates in the S phase of interphase.

From Textbooks • Jun. 9, 2022

Completing the S phase of the cell cycle at night provided a selective advantage.

From Textbooks • Jun. 9, 2022

The centrosome is duplicated during the S phase.

From Textbooks • Jun. 9, 2022

In some species, cells enter a brief interphase, or interkinesis, that lacks an S phase, before entering meiosis II. Chromosomes are not duplicated during interkinesis.

From Textbooks • Apr. 25, 2013