Download Monday, January 25

Monday, January 25
Please copy into your agenda:
Monday: Bacteria problem – due Tuesday
Wednesday: Finish lab – due Thursday; study
guide – due Friday
Thursday: Study guide – due Friday
STEAM night – 5:30-7:30
Friday: DNA & Cell cycle quiz
Reminders:
-STEAM night is this Thursday from 5:30-7:30. If you attend,
please come sign in with me to earn a homework pass
Pods Jobs – Probe
Asker – repeats the question to the group or
reads the problem to the group
First – this person gives their answer first,
then go around the group and everyone
answers the question
Scribe – writes down all of the answers
Voice – read answers to the class
Come to a group decision.
Write your answer and EXPLAIN
YOUR REASONING.
Did the cells grow at all while
the puppy was growing?
If someone disagrees, write
down their answer and
reasoning as well.
How do we get new cells?
Objective of the day...
- Explain the purposes of cell division
(growth and repair / reproduction)
-Describe the process of cell division
Mission: We will be incredible
science students.
• Please read pages 80-85 about cell division
quietly to yourself.
• When done, really spend time looking at page
83 and studying what happens during each
step of mitosis.
You have 6 small blank pieces of colored paper.
Write one of these on each of them:
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
QUICKLY cut these statements and pictures out
(don’t have to be perfect). Leave scraps at the end
of your table.
Cell cycle descriptions
• Goal: sort these descriptions and pictures by
stage of the cell cycle
• Working in your group and using your textbook
(80-85), determine which stage of the cell cycle
each description and cell picture should go with.
Put them under that label.
• There will be more than 1 picture and
description for each one…except cytokinesis
only has 1 picture
There are 2 main stages
to the cell cycle:
Interphase &
Division (Mitosis/Cytokinesis)
Interphase
• The cell grows to its mature size
• The cell makes a copy of its DNA during
replication
• The cell produces structures used during
cell division
• This is the phase that the cell spends a
majority of its time in
• The nucleus is clearly visible
A really dark dot
you may see in the
nucleus is called a
nucleolus. These
form ribosomes.
Mitosis is the part of the cell
cycle in which the nucleus
divides.
It is broken into 4 parts.
Prophase
• The chromatin (which is the DNA
when it’s not condensed) condenses
to form chromosomes
• Spindle fibers form between the
poles
• The nuclear membrane breaks
down
Metaphase
• The chromosomes line up
across the center of the cell
• They attach to the spindle
fibers
Anaphase
• The centromeres split and the
chromatids separate
• The chromatids go to opposite
ends of the cell
Telophase
• The chromosomes begin to
stretch out
• 2 new nuclear membranes
form
Cytokinesis
• The cell membrane pinches off
to form 2 new cells, each with
identical chromosomes
• Each cell now has about half
the cytoplasm and organelles
You begin with one cell, you
end up with 2 identical cells
(each with a complete
set of DNA)!
Please put all papers (descriptions,
labels and pictures) into the bag
that I gave you and then make sure
that I get it back.
Bacteria problem
You start with a single bacteria cell. Every 20
minutes each bacteria cell divides in half to
create a new bacteria cell. How many do you
have after 8 hours? Please show how you got
your answer. Then, graph the results.
Bacteria problem
You start with a single bacteria cell. Every 20
minutes each bacteria cell divides in half to
create a new bacteria cell. How many do you
have after 8 hours? Can you graph this? Label
each axis.
# of Bacteria
Time
Tuesday, January 26
Please write the question and the date.
1/26: If DNA is replicating and the double helix
has unzipped and you now have a single strand,
show the bases that would come and match up:
Please also turn your homework (bacteria
problem) in to the basket on center table.
Tuesday, January 26
Please write the question and the date.
1/26: If DNA is replicating and the double helix
has unzipped and you now have a single strand,
show the bases that would come and match up:
Reminders:
-STEAM night is this Thursday from 5:307:30. If you attend, please come sign in
with me to earn a homework pass
-Yearbook prices go up
After 2/5/16
-Knott’s Berry Farm flyer - optional
How do we get new cells?
Objective of the day...
- Explain the purposes of cell division
(growth and repair / reproduction)
-Describe the process of cell division
Mission: We will be incredible
science students.
Bacteria problem
You start with a single bacteria cell. Every 20
minutes each bacteria cell divides in half to
create a new bacteria cell. How many do you
have after 8 hours? Can you graph this?
What is the takeaway here
– what does this tell us
about how quickly the
number of cells can
increase when cells are
dividing?
# of Bacteria
Time
https://www.youtube.com/watch?v=ofjyw7ARP1c
Add to Cells & Genetics Table of
Contents
Date
1/22
1/26
Title
DNA replication
Cell Cycle Notes
(I will give you this paper)
Page #
4
5
maintain
grow
reproduce
Cells come from other cells
The cell cycle is the regular
sequence of growth and
division that cells undergo.
Sketches
• Sketch each cell like examples using 4 different
color to represent the chromosomes
Sketches
OBSERVATIONS
What do you see?
Discuss and then describe what you see in the
pictures of cells in each stage.
Important Information
As we go over the information for each stage,
make sure that you have the information in
one of your boxes
for that stage
There are 2 main stages to
the cell cycle:
Interphase &
Division
(Mitosis/Cytokinesis)
Interphase
•
•
•
•
•
The cell grows to its mature size
The nucleus is clearly visible
DNA is in the form of chromatin
The cell makes a copy of its DNA during replication
This is the phase that the cell spends a majority of
its time in
Mitosis is the part of the cell
cycle in which the nucleus
divides.
It is broken into 4 parts.
Prophase
• The chromatin (which is the DNA when it’s
not condensed) condenses to form
chromosomes
• The nuclear membrane breaks down
Metaphase
• The chromosomes line up across the
middle of the cell
• They attach to the spindle fibers
Anaphase
• The centromeres split and the
chromatids separate (so the 2 copies of
DNA are separated)
• The chromatids pull apart and go to
opposite ends of the cell
Telophase
• The chromosomes begin to stretch out
• Two new nuclear membranes form
Cytokinesis
• The cell membrane pinches off to form 2
new cells, each with identical
chromosomes
• Each cell now has about half the
cytoplasm and organelles
• Cells will now start interphase again
You begin with one cell, you
end up with 2 identical cells
(each with a complete
set of DNA)!
Interphase
Prophase
Metaphase
Cytokinesis
Anaphase
Telophase
Anaphase
Prophase
Metaphase
A
B
Cytokinesis
C
D
Interphase
E
F
Telophase
Mitosis rap
http://www.youtube.com/w
atch?v=pOsAbTi9tHw
The process of cell division is regulated
by the DNA in the cell. What happens
if something goes wrong and the cells
start dividing uncontrollably?
Wednesday, January 27
Please write the question and the date.
1/27:
a) When in the cell cycle is the DNA replicated?
b) When in the cell cycle do the sister
chromatids (with the 2 identical strands of
DNA) separate?
Wednesday, January 27
Please write the question and the date.
1/27:
a) When in the cell cycle is the DNA replicated?
Interphase
b) When in the cell cycle do the sister
chromatids (with the 2 identical strands of
DNA) separate? Anaphase
Reminders:
-Study guide you get today is due Friday
-STEAM night is this Thursday from 5:30-7:30. If
you attend, please come sign in with me to earn
a homework pass
-Knott’s Berry Farm flyer –
Optional end of year trip
$35 deposit – checks to
Event Source
How do we get new cells?
Objective of the day...
-Describe the process of cell division
-Identify cells in stages of cell division
-Analyze data to form a conclusion
Mission: We will be incredible
science students.
Back of page 5
Interphase
Prophase
Metaphase
Cytokinesis
Anaphase
Telophase
Anaphase
Prophase
Metaphase
A
B
Cytokinesis
C
D
Interphase
E
F
Telophase
Add to Cells & Genetics Table of
Contents
Date
1/27
1/27
Title
Onion Root Tip Investigation
Cell Cycle & DNA Study Guide
(I will give you both paper)
Page #
6
7
Data –
Procedure –
You will be looking at 8 images (A-H)
Each image has 25 cells outlined.
Look at each cell that is identified and determine
if it is in interphase, prophase, metaphase,
anaphase or telophase. Count how many you
have of each and enter it into your data table.
Once you have done this for all 25 cells found on
all 8 images, then add up your data and calculate
the percentage that are in each stage.
Results –
Conclusion –
This paper will be due at the end of the hour, however if needed
you may complete for homework and turn in tomorrow. Please
use your class time wisely.
Thursday, January 28
Write the date and question
1/28 Identify which stage of mitosis each
of these are in (sketch the cell on your
warm-up):
Thursday, January 28
Write the date and question
1/28 Identify which stage of mitosis each
of these are in (sketch the cell on your
warm-up):
Telophase/cytokinesis
anaphase
prophase
Reminders:
-Study guide is due tomorrow (quiz)
-STEAM night is this tonight from 5:30-7:30. If
you attend, please come sign in with me to earn
a homework pass
Logan & Jack M – need
flash drive
Need help with Google
slides
Community Service to
help monitor our area
How do we get new cells?
Objective of the day...
-Describe the process of cell division
-Identify cells in stages of cell division
-Compare data and identify sources of
experimental error
Mission: We will be incredible
science students.
Interphase ___%
Prophase ___%
Metaphase ___%
Anaphase ___%
Telophase ___%
Table #
% Interphase
% Prophase
% Metaphase
% Anaphase
% Telophase
Pods Jobs – Probe
Asker – repeats the question to the group or
reads the problem to the group
First – this person gives their answer first,
then go around the group and everyone
answers the question
Scribe – writes down all of the answers
Voice – read answers to the class
What do you notice about the data?
Everyone looked at the same pictures and the
same 200 cells, so why do you think that the
data is not the same exact for everyone?
What are some of the sources of experimental error?
Please turn your onion root tip paper in to the
basket on center table.
Write quiz questions
• Working with your partner, pretend that you are
making the quiz for tomorrow and do the
following (questions and choices should be
appropriate and relevant to the content over
DNA and the cell cycle):
1-Write 5 true/false questions.
2-Write 5 multiple choice questions.
3-Write 3 short answer/essay questions.
You may not copy questions from the study guide. I
encourage you to draw pictures as part of your
questions.
Do not write the answers. Write neatly.
• Answer the quiz questions with your partner.
• Give the paper back to the group that wrote
the quiz questions.
• Grade and provide feedback to the answers
that are on the quiz you wrote.
Pictionary Rules
1. No words, symbols or numbers – just pictures. Person drawing
cannot talk.
2. Each team sends someone up to draw. You draw until
someone guesses correctly.
3. All teams write down their guesses. Once you think you know
what it is, hold up the whiteboard. If it’s wrong, you get 2 more
guesses (you only get a total of 3 guesses per picture).
4. First team that gets it correct, gets 1 point.
Friday, January 29
Write the date and question
1/29 Who discovered the structure of DNA
and in what year?
Friday, January 29
Write the date and question
1/29 Who discovered the structure of DNA
and in what year? Watson & Crick, 1953
• Please turn your warm-ups in to the basket on
center table. Make sure that your name is on
them. 
Reminders:
-STEAM Night homework passes
-Knott’s Berry Farm flyer – Optional end of year
trip $35 deposit – checks to Event Source
-Next Fri is last day to pre-order
Yearbook for $25
(give orders to me)
Study guide – page 7
5 minutes to study/quiz each
other/ask questions
Anaphase Prophase Interphase telophase Metaphase
Interphase metaphase Prophase telophase Anaphase
• Please turn your study in to the basket on
center table. Make sure that your name is on
it. 
-Quiz
-Read pages 88-92, answer checking your
reading and review questions at the end
(?s total)
You should have the
following:
Interphase: 1
Prophase: 1
Metaphase: 2
Anaphase: 2
Telophase: 1
Nucleus is
present in
this cell