The Cell Cyle

G0 or senescent

resting/non-dividing cells

• cells in this cycle that divide are somatic

The Cell Cycle

interphase → mitosis

Interphase

bulk time (>90%)

G1

S

G2

G1

Gap1 - cell grows + preps for DNA replication

S

Synthesis - DNA replication

G2

Gap2 - prep for mitosis

Mitosis

divison (PMAT acronym)

PMAT

Prophase, Metaphase, Anaphase, Telophase/Cytokinesis

Prophase

chromatin condenses into distinct chromosomes

• special microtubules = spindle fibers that begin to form @ centrioles

Metaphase

spindles attach to protein structures @ centromere = kinetochore

• chromosomes line up @ metaphase plate/equator lining up in the cafeteria

Anaphase

spindles begin to shorten and pull sister chromatids apart

• once sisters are separated, they are now chromosomes

Telophase/Cytokinesis

nuclear membrane reforms and cytoplasm divided and membrane reforms around 2 cells

Formation of sex cells (gametes)

interphase → meiosis I → meiosis II