Transcript M&M`s - Bloomfield Public Schools

M&M’s
By :Janice Bariffe, Kanysha Crosby, Aubre Green,
Taylor Hogan, Valerie Moore
M&m’s Not the Candy
The M&M’s we are
referring to are
Meiosis& Mitosis.
Meiosis and Mitosis is
a type of process of
sex cell going
through different
stages
Meiosis
Meiosis is the process by which the
number of chromosomes is reduced by
half to form sex cells-sperm and eggs.
During Meiosis, the chromosome pairs
separate and are distributed to two
different cells. The resulting sex cells
have only half as many chromosomes
as the other cells in the organism.
Meiosis
1.Before meiosis
begins, every
chromosomes are
copied.
2. The chromosome
pairs line up in the
center.
3. The pairs separate
and move to the
opposite ends of the
cell.
Meiosis
4.Two cells form, with the
same amount of
chromosomes.
5. Then the chromosomes
move to the center with
the chromatids.
6.The chromatids & the
centromeres go to the
opposite end of the cell.
Lastly 4 cells form.
Mitosis
Mitosis is the stage during which
the cell’s nucleus divides into two
new nuclei. During mitosis, one
copy of the DNA is distributed into
each of the two daughters cells.
Mitosis
1. The first stage is that the cell
grows to its mature size and
makes copies of it’s DNA.
2. The second stage is that the
chromatin in the nucleus
forms the chromosomes.
3.The third stage is that the
chromosomes line up
across the center of the cell .
Each chromosomes
attaches to a spindle fiber at
its centromeres.
Mitosis
4.The centromeres split. The
two chromatids separates.
One chromatids is drawn by
its spindle fiber to one end
of the cell. The other
chromatid moves to the
opposite end of the cell. The
cell stretches out as the
opposite ends are pushed
apart.
5.The chromosomes begin to
stretch out and lose their rod
like appearance. A new
nuclear envelope forms
around each region of
chromosomes.
Mitosis
6.The cell membrane
pinches I around the
middle of the cell. The
cell splits in two. The
cell ends up in
identical sets of
chromosomes.