Download Lesson: Mitosis and Meiosis Lab

3/2/16
Materials Needed: Binder, Pencil
LS-7
Homework: # 53
DO NOW:
What is the primary advantage
of sexual reproduction
(meiosis) over asexual
reproduction (mitosis)? Use
complete sentences.
Agenda:
1. Do Now (5)
Give homework
2.1.Experiment
(10)
3. Dismiss
(3)the
#52 to
materials
manager to turn
in.
Objectives
2. Write down the
• Scientists
will in
be
homework
able
to describe
your
agenda. the
basic rules and
3.procedures
Do the DOofNOW.
6th
science.
4.grade
If you
finish
early,
thumbs up.
Today’s Agenda
•
•
•
•
•
Objectives
Mitosis and Meiosis Introduction
Lab
Discussion
Homework: #52
Objectives
Scientists will be able to create a model
to represent different types of cell
division.
Writing and speaking: Students will describe cell division.
What are we doing?
We are learning about cell division.
Why are we doing it?
In order to understand how we grow and
develop differently, we need to examine the
processes of cell division.
How do I know you’ve got it?
When you can explain the purpose of each type
of cell division, you’ve got it!
Zygote: the cell that results from two sex
cells combining. It has one set of
chromosomes from each of the
gametes.
Zygote: the cell that results from two sex
cells combining. It has one set of
chromosomes from each of the
gametes.
Asexual Reproduction: Mitosis
• Cell division and reproduction can occur in two
ways - mitosis and meiosis.
• Mitosis is a process of cell duplication, or
reproduction, during which one cell gives rise to
two genetically identical daughter cells.
• Mitosis is used by single celled organisms to
reproduce; it is also used for the organic growth of
body cells, tissues, and fibers.
• Mitosis creates cells identical the original cell.
Sexual Reproduction: Meiosis
• Meiosis is a division of a cell involving two divisions
of the chromosomes and giving rise to four
gametes, or sex cells, each possessing half the
number of chromosomes of the original cell.
• Meiosis is useful for sexual reproduction of
organisms. The male and female sex cells, e.g. the
sperm and egg, fuse to create a new, singular
biological organism (Zygote).
• Meiosis creates cells with different combinations of
DNA from the original cell. This leads to genetic
variability.
Vocabulary: Don’t get confused!
• Gamete: sex cell, one for female, one for male
• Zygote: the cell that results from fertilization
of two gametes (sex cells) that has 2 copies of
chromosomes (one from each sex cell).
• Fertilization: Male gamete and Female
gamete fuse to create a zygote
Mitosis and Meiosis!
• In pairs, you are creating a model using the
provided materials to demonstrate the process
of cell division. First you must create a plan and
have the plan approved, then you will create
your model. Your models will be shared with
the class.
• How to get the A+: What are our expectations
today?
Which of the following is the primary advantage
of sexual reproduction when compared to
asexual reproduction?
A. There is a greater number of offspring
B. There is more food available to offspring
C. There is a genetic variety in offspring
D. There is a longer development time for
offspring
Which of the following is an example of asexual
reproduction?
A. Turtles lay fertilized eggs in a pit in the sand.
B. Seeds form in pine cones after pollen reaches the
cones.
C. Fish release egg cells and sperm cells at the
surface of the water.
D. Trees send out root-like extensions that produce
new stems.
HW: #53
Step 1: Login to google classroom and find our class.
Step 2: Watch the video link provided for you.
Step 3: Fill out the HW 53 document on google
classroom and submit it for a grade. Your work
must be your own!
Scientist of the Day