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DNA replication takes place during the synthesis phase of the cell cycle. The cell also forms a second centrosomeduring this phase.

The synthesis phase is often written as S phase. It occurs after the first growth (G1) phase, and therefore about midway through interphase.

At the start of the S phase, each chromosome has only one DNA molecule, but by the end of the S phase each has two, which, barring copying errors, are genetically identical, i.e. they have identical base sequences.

The doubling of the DNA and the centrosome constitute preparations for a subsequent cell division (mitosis or meiosis). A cell that is not due to divide will not go through an S phase.
During the synthesis stage of the cell cycle, a cell makes (replicates its own) DNA.

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9y ago

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Related Questions

Why chromosome observed in prophase but not in interphase?

Chromosomes are condensed and visible in prophase due to the coiling of DNA to form compact structures. In interphase, chromosomes are in their less condensed state, called chromatin, making them less visible under a microscope. This allows for gene expression and DNA replication to occur before cells enter mitosis and condense their chromosomes again.


In which phase do the chromosomes coil and become short and thick?

Prophase is inside the nucleus the chromosomes get short and thick and as they coil up become visible as pairs attached by the centromere. The centromere is joined to special proteins to from the kinetochore.


How is mitosis and meiosos alike and different?

Mitosis is the process in where cells are made throughout the body. The process is called IPMAT, this stands for Interphase Prophase Metaphase Anaphase Telophase Mitosis makes different cells with different functions for specific body functions except for the sex gametes. Meiosis on the other hand makes the sex gametes and its process is the same except it is repeated twice. It is called IPMATPMAT Interphase Prohase Metaphase Anaphase Telophase Prophase Metaphase Anaphase Telophase Meiosis can only make sex gametes and nothing more.


What is the difference ealy prophase and late prohase?

Early prophase is the first stage of mitosis where chromatin condenses into visible chromosomes and the nuclear envelope begins to break down. Late prophase is the second stage where the chromosomes have fully condensed and the microtubules of the mitotic spindle begin to capture and align the chromosomes in preparation for metaphase.


Which event occurs during prohase?

First off, just so you know, I think you mean "Which event occurs during prophase?" which is just a heads up. Answer: The spindle fibers form. Hope this helps.


DNA replication takes place when?

DNA replication takes place when preceding interphase.


How does a tetrad form in a prohase 1 of meiosis?

you put the lime in the coconut


What occurs in the s-phase?

In the S phase, some activities related to the cell division take place (s stands for synthesis).The cell's DNA replicates, ensuring that future cells obtain similar copies of its hereditary material, and proteins associated with DNA are produced during this phase.


Chromosomes align in center of cell?

During metaphase of mitosis, chromosomes align along the center of the cell (the metaphase plate) to ensure they are evenly separated to opposite poles during anaphase. This alignment is necessary for proper distribution of genetic material to daughter cells.