Biology-2.2 All cells arise from other cells

mitosis, interphase, cytokinesis

mitosis- prohpase

-chromosomes condense (now visible)

-nuclear envelope disintegrates

-centricles move to opposite poles of the cell

-forms spindle fibres

mitosis- metaphase

-chromosomes line up along the equator of the cell

-attach to spindle fibres by their centromere

mitosis- anaphase

-the centromere splits and the chromatids are pulled to the opposite parts of the cell

mitosis- telophase

-two groups of chromosomes condense and a nuclear envelope reforms around then

interphase-G1, gap phase 1

-first part of interphase

-cell grows in size

-large amounts of proteins produced

-preparation for division

interphase- GO, G1 checkpoint

-check to see if its large enough, has enough proteins and organelles for DNA synthesis to occur

-if not large enough interphase is extended

interphase- S phase

-DNA begins to replicate

-begins when replication starts, ends when final replication finishes

-happens as quickly as possible

interphase-G2, gap phase 2

-gap between DNA synthesis and mitosis

-cell continues to grow

-there is a G2 checkpoint to make sure the DNA had been duplicated without damage

-if damaged it will either fix or apoptosis (cell suicide)

cytokinesis

-cytoplasm divides

-cleavage furrow forms to divide cell membrane

-provides 2 genetically identical daughter cells

-separate process to mitosis

-cell then goes back to G1