Transcript L.16.17 Cell Division Module

Cell Division
SC.912.L.16.17
Compare and contrast
mitosis and meiosis and
relate to the processes
of sexual and asexual
reproduction and their
consequences for
genetic variation
Source: http://www.visualphotos.com/photo/1x6011929/celldivision-immunofluorescent-light-micrograph.jpg
What do I need to know?
 Describe specific events occurring in
each of the stages of the cell cycle and/or
phases of mitosis, including cytokinesis.
 Describe the process of meiosis,
including independent assortment and
crossing over.
 Differentiate the processes of mitosis and
meiosis and describe the role of mitosis
in asexual reproduction, and/or the role of
meiosis in sexual reproduction, including
how these processes may contribute to or
limit genetic variation.
 Relate the development of cancer
(uncontrolled growth) to mutations that
affect the proteins that regulate the cell
cycle.
Cell Cycle with Mitosis
Organisms grow by
creating more cells
through division. The cell
cycle is the process of a
cell growing, preparing
for division and dividing.
This process occurs in
two steps
1) Interphase: Growth
and preparation for
division
2) Cell Division: Division
of the cell
Cell Cycle with Mitosis
Guiding Questions:
What is the
difference between
haploid and diploid
cells.
What occurs during
each of the steps of
the cell cycle?
Video: https://www.youtube.com/watch?v=1cVZBV9tD-A
Cell Cycle with Meiosis
Meiosis is a second
type of cell division
that reduces the
number of
chromosomes in a
diploid cell by half
producing haploid
cells.
These haploid cells
are used for the
process of sexual
production
Source:http://4.bp.blogspot.com/-jjDKcYUsL9A/UYUsB9c8RII/AAAAAAAAATA/KgsbgtNaYAU/s1600/meiosis-2.jpg
Cell Cycle with Meiosis
Guiding Questions:
What are the steps
of meiosis?
How many times
does a cell divide
during meiosis?
What is occurring
during crossing
over?
Video:
https://www.youtube.com/watch?v=rB_8dTuh73c
Mitosis vs Meiosis
-2 identical daughter
cells.
-Diploid cells
-1 division
-Asexual Reproduction
-Types of cell division
-Follow similar steps
(IPMATC)
-4 non-identical
daughter cells
-Haploid cells
-2 division
-Sexual Reproduction
Cancer
Mutations to the DNA in
a cell can lead to the
proteins that regulate
the cell cycle to lose
control.
This results in the
uncontrolled cell
division and the
formation of masses in
the body called tumors.
Source:http://piniesarjona.wikispaces.com/file/view/Cancer_Biolog
y.jpg/47976793/Cancer_Biology.jpg
Cancer
Guiding Questions:
1) What is cancer?
2) What is the cause
of Cancer?
3) What are the
different types of
tumors?
4) What are different
treatments for
cancer?
Video:
https://www.youtube.com/watch?v=UopUxkeC4Ls
Show What You Know
 Mitosis and meiosis are processes
involved in cellular reproduction. Which
of the following describes an event that
results from mitosis but NOT meiosis?
a. two stages of cell division
b. replication of cellular genetic material
c. daughter cells that are identical to the
parent cell
d. four daughter cells that are produced
from each parent cell
Show What You Know
 The diagram below shows homologous chromosomes
during Prophase I of meiosis?
Which of the following correctly describes the process being
illustrated?
a. Crossing-over in which alleles are exchanged.
b. Mutation in which the DNA content of the gene is altered.
c. Segregation of sister chromatids.
d. Condensation and segregation of alleles.
Show What You Know
 Which of the following best describes
meiosis?
a. It happens in all tissues except the brain
and spinal cord.
b. It occurs only in cells in the
reproductive structures of the organism.
c. It is carried out in all tissues that require
cell replacement.
d. It is the first stage of mitosis.
Show What You Know
 Which of the following phrases best
describes cancer?
a. Presence of genetic defects caused by
hereditary disorders.
b. Uncontrolled cell growth caused by
mutations in genes that control the cell
cycle.
c. Absence of cyclins in the DNA.
d. Multiple gene mutations on a
chromosome of DNA.
Show What You Know
 Which row in the chart below indicates
the correct process for each event
indicated?
a. Row 4
b. Row 2
c. Row 3
d. Row 1
Show What You Know
 Which of the following phases of
mitosis is represented by the
diagram below?
a. Anaphase
b. Prophase
c. Metaphase
d. Telophase