Download Mitosis Phases - Southington Public Schools

The Phases of Mitosis
Interphase—this is the “In-between” phase.
 Chromosomes not visible for most of interphase.
 Chromosomes are replicated near end of interphase.
Prophase—this is the “Paired” chromosome phase.
 Chromosomes are visible as pairs called sister
chromatids.
 Pairs held together by centromere.
 Centriole and spindle fibers form in cell.
Metaphase—chromosomes line up in the “Middle”.
 Sister chromatids line up in middle of cell and
attach to the spindle fibers by the centromere.
Anaphase—chromosomes move “Apart”.
 Centromeres split apart and chromatids separate.
 One chromatid from each pair moves to each side of
the cell.
 Chromatids pull themselves apart by the spindle
fibers.
Telophase—“Two” cells are formed.
 Chromatids reach opposite sides of cell.
 Chromosomes unwind and become unseen again.
 New cell membrane (and cell wall in plants) forms
between halves.
 Two identical daughter cells are formed.