Download Cell Division -Asexual and Sexual Mitosis and Meiosis A Review

Cell Division -Asexual and Sexual
Mitosis and Meiosis
A Review
Cell Cycle = I PMAT C
Mitosis is.....
-asexual division of life into two identical “daughter cells”
-each new cell gets a double set of chromosomes. In
humans this is 46.
-A double set of chromosomes is referred to as diploid
(2n) (ie.2x's number of copies)
-mitosis creates new cells in your body and in diploid
organisms (all animals and some plants and stages of
plants)
http://www.exploratorium.edu/imaging_station/students
/sea_urchins_div.html
Mitosis = PMAT – one division of the nucleus
creating an exact copy (clone)
Mitosis in Animals
I PMAT C – memory trick
• I = interphase – performing normal functions (ie
growth and preparation and DNA replication)
Mitosis:
−
−
−
−
P = prophase – doubled chromosomes become
visible
M = metaphase – chromosomes line up at equator
of cell
A = anaphase – chromosomes separate and move
to opposite poles of cell
T = telophase – nuclear envelope reforms and 2
new cells begin to form
• C = cytokinesis – cell cytoplasm divides in two
Identify the stages of mitosis
Identify the stages of mitosis - ANSWERS
Meiosis = two
divisions of the
nucleus (meiosis I and
meiosis II)
- leads to genetic
variation
This results in half the
number of
chromosomes (n) which
is necessary for sexual
reproduction.
These cells are haploid
(n).
Identify the stages of meiosis
Identify the stage of meiosis - ANSWERS
Anaphase I
Metaphase I
Prophase II
Anaphase II
Metaphase II
Telophase II
Prophase I
Telophase I