Objective: How does an organism's method of reproduction affect its chance for survival?
Warm-up:
Way back in September we learned about two types of cells, prokaryotes and eukaryotes. What do you
remember about them?
Lesson:
We read pages 612-615 yesterday, but we did not fill out all the notes. You won’t find these answers in
the book so time to do a bit a research. Answer the following questions then place them in the notes
below.
What type of
organisms reproduce
asexually?
Prokaryotic
Identify three
organisms that
reproduce asexually.
Hydra, Bacteria, Starfish
What is the benefit of
reproducing
asexually?
Little genetic variation means that the organisms are well suited for their
environment. Reproduction is quicker.
What types of
organisms reproduce
sexually?
Eukaryotic
What is the benefit of
reproducing sexually?
Greater genetic variation allows for organisms to adapt to environmental
changes
Why is the process of
meiosis important to
sexual reproduction?
It creates cells with half the number of chromosomes so that when sex cells
meet the correct number of chromosomes will be present.
I.
II.
III.
IV.
V.
VI.
VII.
VIII.
Asexual Reproduction- A single parent produces genetically identical offspring
A. Budding- A small part of the parents body develops into an independent organism
B. Fragmentation- An organism breaks into two or more parts and each part becomes a
separate organism.
What types of organisms reproduce asexually?
What benefits are there to asexual reproduction?
Sexual Reproduction- Reproduction with two parents
A. Egg- Female sex cell
B. Sperm- Male sex cell
C. Zygote- Fertilized cell
Meiosis- a cell copying process that produces cells with half the number of chromosomes.
What benefits are there to sexual reproduction?
Internal Fertilization - The egg is fertilized inside the female. (Mammals)
External Fertilization - The eggs are fertilized outside of the female’s body. (Frogs)
How many parents are needed to reproduce sexually?
Two
What is the difference between monotremes and marsupials?
Monotremes are egg laying mammals while marsupials give birth to live young.
How is a zygote formed?
A zygote is formed when a female sex cell and male sex cell meet. The fertilized cell is called a zygote.
Extension question: ​Dino DNA
If you remember this part of the movie you should also remember that some problems arose from the
use of the frog DNA. Do you remember what that problem was?
Closure:
Describe the difference between asexual and sexual reproduction