YARN MITOSIS
adapted from: http://local.brookings.k12.sd.us/biology/teacherlinks/yarnmitosis.htm
Phase
Interphase
Prophase
description
DNA is spread out as chromatin. Cell
starts with 6 chromosomes. (3 long
purple and 3 long green strings in
center of cell). Nuclear membrane is
visible. (place pink yarn piece around
DNA). At the end if Interphase, the
DNA is copied. (use 3 long purple and
3 green strands and add to nucleus).
Replace longer yarn pieces in nucleus
with shorter ones because the DNA
condenses. Keep 2 matching pairs
together. Nucleus disappears (remove
pink yarn around chromosomes).
Spindle fibers appear (students fingers
will play role of spindle fibers).
Way to
remembe
r
IN
between
dividing
First
diving
phase Pros are
#1
Metaphase
Chromosomes line up in middle of the
cell (place yarn pairs in center of cell
in a line).
Middle
Anaphase
Chromosome pairs separate and move
toward opposite ends of the cell (use
fingers (spindles) to pull apart yarn
and move toward opposite sides of
cell.)
Apart
Telophase
Chromosomes spread back out into
DNA. (replace shorter purple and
green stands with longer ones).
Nucleus returns (put a pink string
around each set of chromosomes).
Two
nuclei
Cytokinesis
Cytoplams splits in two. (pinch center
of fell membrane together to make
two new cells.)
cytoplasm
splits
Image