Download meiosis-wksts-4

Nov 18,2016
Science 9
Dryden Webb
body cells
gametes
body cells
mitosis
egg cells
sperm cells
chromosomes
The gametes have half the number of chromosomes as body cells.
Nov 18,2016
Science 9
Dryden Webb
8
4
The doubled chromosomes line up across the center/middle of the cell.
To opposite sides of the cell.
Different
Each cell has one chromosome from each pair. Also each chromosome
is composed of sister chromatids.
The chromosomes in the centre of the cell are not paired.
The sister chromatids separate just like a telophase in mitosis.
4 new cells.
Half the number of
chromosomes.
Nov 18,2016
Dryden Webb
Science 9
The nuclear membrane/nuclear envelope disappears.
The nucleolus disapears.
The homologous chromosomes pair up and each attach The nucleolus fades/disappears.
The nuclear membrane disappears.
to spindle fibers. The non sister chromosomes
The spindle fibers form.
exchange genetic material (crossing over).
The Individual spindle fibers attach to the chromosomes.
.
The nucleolus disappears
The nuclear membrane disappears.
The chromosomes and homologous pair up at the
equator of the cell to the spindle fibers.
The spindle fibers would contract and shorten.
The chromosomes and the homologous attached
to the centromeres separate and are pulled from
the spindle fibers to opposite poles of the cell.
One chromosome from each homologous pair
is at each pole/side of the cell.
The spindle fibers disappear.
The nuclear membrane/nuclear envelope reforms.
The cytokinesis divides the cell into two cells.
cell divides in two (which are not genetically
identical to parent cell). The cell would grow
and make proteins like an inter-phase in mitosis.
There is no replication of DNA in this stage.
The nucleolus disappears.
The nuclear membrane disappears
The chromosomes line up at the center/equator
of the cell attaching to the spindle fibers.
The spindle fibers contract and shorten.
The centromere pulls apart, and the sister chromatids
separate and are pulled to opposite poles by the
spindle fibers.
One complete set of chromosomes is now at each
pole of the cell. The spindle fibers dissapear.
The nucleolus appears with each nucleus.
The nuclear membrane forms.
Where a cell in tenophase divides in two
(which is genetically identical to parent cell).
The cell that divides will grow and make proteins like an
inter-phase in Mitosis. The DNA will replicate later in
inter-phase.
Nov 18,2016
Science 9
Dryden Webb
The nucleolus dissapears as well as the nucleus.
The nuclear membrane dissapears.
The spindle fibers form.
Individual chromosomes get attached to the spindle
fibers.
The nucleus dissapears.
The nuclear membrane dissapears/fragments as
well. The spindle fibers form.
The individual chromosomes in the cell
attach to the spindle fibers that are made from the
centrioles.
The nucleus dissapears.
The nuclear membrane dissapears.
The spindle fibers form.
The x shaped chromosomes attach to the spindle
to form a straight line at the center/equator of the cell.
The nucleolus dissapears.
The nuclear membrane also dissapears.
The spindle fibers form.
The chromosomes that are shaped like an x
attach to the spindle fibers and align a single line
at the equator/center of the cell.
The nucleolus dissapears.
The nuclear membrane/nuclear envelope disappears.
The spindle fibers contract and shorten/disappear.
The centromere pulls apart and the
sister chromosomes (chromatids) separate
and get pulled to their opposite poles by the spindle.
The nucleolus dissapears.
The nuclear membrane dissapears as well.
The spindle fibers contract and shorten.
The centromere pulls apart and the sister
chromatids separate and are pulled to opposite poles
by the spindle fibers.
The chromosomes decondense.
There is half of the complete set of the
chromosomes are now at each pole of the cell.
(There is one chromosome for each pair.)
The spindle fibers disappear.
The nucleolus appears with each nucleus.
The new nuclear membrane/nuclear envelope forms.
. The Cytokinesis divides the cell into two cells
One complete set of chromosomes are now at each
pole of the cell.
The spindle fibers disappear.
The nucleolus forms.
The nucleolus appears with each nucleus.
The nuclear membrane forms.
The cell divides into two cells (total four haploid
daughter cells that are not identical to parent cell.)
The Cytokinesis divides the cells by removing
spindle fibers.
The cell would produce proteins just like an
interphase in mitosis.
The cell divides into two cells( the total is two
daughter cells that are identical to the parent cell.)
The Cytokinesis divides the cells by removing the
spindle fibers.
The cell would grow and make proteins like an
interphase in mitosis.