S-phase is not characterized by (a) DNA duplication (b) No increase in chromosome number (c) DNA

step 1 Hi all first of all here we are discussing about synthesis phase or S phase okay but here in our

S-phase is not characterized by (a) DNA duplication (b) No...

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Key Concepts

Chromosome Number Maintenance

Despite the doubling of DNA during S-phase, the total number of chromosomes in a cell remains constant. This is because the replicated chromosomes are held together as sister chromatids, maintaining the original chromosome count until cell division separates them.

Centriole Duplication

Centriole duplication is the process by which centrioles, key components of the centrosome, are replicated to help organize the mitotic spindle during cell division. Although it occurs in synchrony with the cell cycle, centriole duplication is a cytoplasmic event rather than a nuclear one, distinguishing it from the predominantly nuclear events of S-phase like DNA replication.

S-phase

S-phase is a phase within the cell cycle where the cell synthesizes a complete copy of the DNA in its nucleus. Although the DNA content is doubled, the overall number of chromosomes does not increase because the replicated DNA strands remain attached as sister chromatids until they separate later in mitosis.

DNA Replication

DNA replication is the process of producing an exact copy of the cell's DNA. It occurs during S-phase and is essential for passing genetic information to daughter cells, ensuring that each new cell receives a complete set of chromosomes.

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