Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Copy of Microscope Template

No description
by

Lindsey Laury

on 11 March 2016

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Copy of Microscope Template

MITOSIS REVIEW
Think about what we been discussing so far about cell division:
That is not the case!
Most organisms do not reproduce through
mitosis -
this would result in
IDENTICAL
offspring


Every species has their own specific number of chromosomes;
Dogs have 78 chromosomes, cats have 38, and mice have 40!


1 What is the purpose of mitosis (3)?
2 What type of cells undergo mitosis?
3 How does the chromosome number change between the parent (original) and daughter (new) cell?
4 What is a trick to remember the stages of the cell cycle?
5 What is the end result of cell division? (how many cells, identical or different?)
6. In what stage does chromatin condense down to form a chromosome?


allows for diversity in a population!
keeps chromosome numbers correct!
Meiosis

is the process our cells undergo to create
SEX CELLS


SEX CELLS
have
1/2
of the amount of chromosomes!

Review- What is a Chromosome?
A
CHROMOSOME
is a threadlike structure in the nucleus of a cell that contains genetic information that is passed on from one generation to the next
Humans have 46 total chromosomes, or 23
HOMOLOGOUS PAIRS

Humans have
46
chromosomes, or
23
pairs
Don't forget our plants too!
MEIOSIS
A Koala Bear cell with
16
chromosomes undergoes
MITOSIS
, how many chromosomes will a daughter (newly made) cell have?

A Koala Bear cell with
16
chromosomes undergoes
MEIOSIS
, how many chromosomes will a daughter (newly made) cell have?
Koala Bears are actually marsupials, not bears, and are more closely related to opossums and kangaroos
Use the remaining time to complete the Mitosis vs. Meiosis worksheet

You may work with a partner

Turn it in when finished!
WHY DOES THIS NEED TO HAPPEN??
CELL DIVISION (MITOSIS):
why do organisms need it?

Organisms all have their own unique
DNA
, or genetic code.

This code is packaged in the form of

chromosomes
during cell divison
DNA ----> CHROMATIN---->
CHROMOSOMES
MITOSIS
is a process in which DNA is copied and an
IDENTICAL CELL
is made from another cell

*Mitosis occurs in our
body cells
*Mitosis is part of the
cell cycle!

MAJOR STEPS OF THE CELL CYCLE:
INTERPHASE
PROPHASE
METAPHASE
ANAPHASE
TELOPHASE
CYTOKINESIS




I
P
LAY
M
USIC
A
T
T
HE
C
LUB
Major events of cell division:

Interphase
- DNA is replicated, cell prepares for mitosis
Prophase- DNA (chromatin) condenses to form chromosomes
Metaphase- Chromosomes migrate to cell center
Anaphase - Chromosomes are split apart and move to ends of cell
Telophase- Cell prepares to split
Cytokinesis
- Cell splits into 2, resulting in TWO IDENTICAL CELLS
MITOSIS PLAY-DOH DEMONSTRATION
Wait - so is it CHROMOSOME or CHROMATIN?

CHROMATIN
condenses down to form
CHROMOSOMES
during Mitosis
The Cell Cycle!
Prior to Division
2 chromosome organism
Interphase - DNA is replicated
Prophase -

chromatin
condenses and
chromosomes
are formed


Anaphase - Chromosomes split and migrate to opposite sides
Telophase and Cytokinesis- Cell prepares to divide
Metaphase - Chromosomes move to center and prepare to be split apart
CHROMATIN in nucleus
Organisms have a way to make identical copies of their chromosomes and put them in newly formed cells -
but how?
MITOSIS
Mitosis vs. Meiosis
Meiosis relates to sexual reproduction:

What is an
advantage
for organisms to sexually reproduce?

What would be a
disadvantage
?
Science Starter #2
(Same page as yesterday)
Justify why it is necessary for
chromatin
to condense to a
chromosome
before replication
Cell division is part of the
cell cycle
!
WAIT!!! WERE YOU LISTENING?
The
Cell Cycle
is the
REPEATING
process of
growth and division
that a cell goes through during it's lifetime.
Which part of the cell cycle does the process of
CELL DIVISION
mainly take place?
A scarlet macaw has
64
chromosomes in each of it's body cells. If it's wing were injured,
MITOSIS
would occur to repair the injury.
How many chromosomes
would be in the two cells after cell division takes place?
Science Starter:
Answer the following question with a partner on a whiteboard:
Describe how
mitosis
is used differently for
SINGLE
CELLED organisms vs.
MULTI
CELLULAR organisms
(hint: GRRRRRR!)
Let's stop and think:

What would
our
population look like if we
reproduced
through the process of
mitosis
?
Meiosis
Arrange the following from
SMALLEST
to
LARGEST
:
ORGANS
ORGAN SYSTEM
CELLS
ATOMS
TISSUES
ORGANELLES
ORGANISM
ATOMS
ORGANELLES
CELLS
TISSUES
ORGAN
ORGAN SYSTEM
ORGANISM
INTERPHASE
PROPHASE
METAPHASE
ANAPHASE
TELOPHASE
CYTOKINESIS
MITOSIS
(pmat)
Interphase = resting phase
animal cell (whitefish)
First step of mitosis =
PROPHASE
!
DNA has replicated and chromosomes are visible!
METAPHASE
Chromosomes line up to the center of the cell, preparing to divide
P
M
AT
PM
A
T
ANAPHASE
Chromosomes split and move away from one another
Mitosis = 2
identical
cells!!!
TELOPHASE
CYTOKINESIS
PMA
T
PROPHASE
A hedgehog cell with
90
chromosomes undergoes
MEIOSIS
...how many chromosomes will these newly formed
sex cells
have?
A hedgehog cell with
90
chromosomes undergoes
MITOSIS
...how many chromosomes will these newly formed
body cells
have?
A gorilla cell with
48
chromosomes undergoes
MITOSIS
...how many chromosomes will these newly formed
body
cells have?
A gorilla cell with
48
chromosomes undergoes
MEIOSIS
...how many chromosomes will these newly formed
sex
cells have?
Full transcript