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

In the S phase, DNA replication can proceed through the mechanisms that result in the formation of identical pairs of DNA molecules—sister chromatids—that are firmly attached to the centromeric region.

From Textbooks • Jun. 9, 2022

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

A cell that does not meet all the requirements will not be released into the S phase.

From Textbooks • Apr. 25, 2013

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