Mitosis Flashcards
Interphase
• Draw:
• Label:
– Plasma
membrane
– Nucleus
– DNA
• Interphase is not part of
mitosis
• This is when the cell is doing
its “everyday” job and
getting ready for mitosis
• Cell grows
• Copies DNA
Prophase
• Draw:
• Label:
– Plasma
membrane
– Nucleus
– Chromosomes
– Centromeres
– Spindle Fibers
– Centrosome
• Beginning of mitosis
• DNA compacts into
chromosomes
• Centrosomes appear and begin
to move to opposite ends of
cell making the poles of the cell
• The nuclear envelope breaks
down
• The mitotic spindle forms. It is
made up of spindle fibers
attached to each centrosome
Metaphase
• Draw:
• Label:
– Plasma
membrane
– Chromosomes
– Centromeres
– Spindle Fibers
– Centrosome
– Metaphase Plate
• Sister chromatids attach to
the spindle fibers at the
centromere.
• Each centromere has two
kinetochores that attach to
the spindle fibers, one from
each centrosome
• This causes the
chromosomes to line up on
the metaphase plate
Anaphase
• Draw:
• Label:
– Plasma
membrane
– Chromosomes
– Centromeres
– Spindle Fibers
– Centrosome
• Sister Chromatids separate and
begin to move to opposite
ends of the cell
• The centrosomes shorten the
spindle fibers dividing the sister
chromosomes and bringing
them to opposite side of the
cell
• Each chromatid is now
considered a new chromosome
Telophase
• Draw:
• Label:
– Plasma
membrane
– Chromosomes
– Nuclei (pleural)
– Centrosome
• Begins when the new
chromosomes reach the
centrosome
• The spindle fibers break down
• Two new nuclei form and the
nuclear envelope forms around
the chromosomes at each pole
of the cell
• Chromosomes appear as
chromatin
• Cytokinesis occurs