Download Two Types of Asexual Reproduction

Name_______________________________
Period _____ Date ____________________
Asexual and Sexual Reproduction
You have two parents – one male and one female. Most living things come from two parents.
Reproduction from two parents is called sexual reproduction. Sexual reproduction results in
offspring that are _________ exactly like either parent. Because the offspring from sexual reproducing
organisms inherit genes from two parents, they are more varied. They are
____________________ offspring.
There is another kind of reproduction that comes from one parent. Reproduction from only one parent
is called asexual reproduction. The offspring of asexually reproducing organisms inherit the genes
from only one parent. Therefore, they are ______________________________ to that parent.
This results in more _____________________ offspring.
There are several kinds of asexual reproduction. The simplest kind is called binary fission. Bacteria
and simple one-celled plants and animals reproduce by binary fission. Other types of asexual
reproduction include budding, fragmentation/regeneration, and vegetative propagation.
Asexual
Sexual
1. Offspring are all identical
7. Variation so offspring are different
2. Able to adapt to environment
8. One parent
3. Requires gametes or sex cells
9. Used by many single celled organisms
4. Usually faster and easier
10. Prevents organisms from adapting
5. Used by most animals
11. Results in natural selection
and flowering plants
Types of asexual reproduction:
1. Binary Fission
2. Budding
3. Fragmentation/Regeneration
4. Vegetative Propagation
12. Does not require fertilization
1. ______________________:
Bacteria -
It has a cell membrane and cytoplasm just like other cells.
It has nuclear material but no nuclear membrane so its nuclear material is
spread out through the cytoplasm.
It reproduces by BINARY FISSION.
Amoeba - An amoeba is a one-celled animal that lives in the water.
It reproduces by BINARY FISSION.
Questions:
1. What part of the cell divides first?
__________________
2. After the nucleus divides what happens next?
___________________________
__________________________________________
3. Can you tell, genetically, the two new cells from the parent cell? _______
4. Why not? _____________________________________
_____________________________________________
Paramecium
A paramecium is a one-celled animal that lives in the water.
It also reproduces by BINARY FISSION.
2. _________________:
Yeast
Yeast is a fungus that is used in making bread. It reproduces by BUDDING. In budding, a
tiny organism grows out from the parent cell. When it is large enough it breaks off from the parent cell. It
grows until it is able to reproduce. Yeast is the most common organism to use budding but other animals
such as a hydra also reproduce by budding.
What To Do:
1. Look at the pictures below. You will see a budding yeast cell.
2. Read the sentences below the picture and place the number of the picture next to the sentences that
describe what is happening.
_____ The nucleus moves towards the bud and nucleus duplicate
_____ The bud breaks off from the parent cell.
_____ The bud with one nucleus grows larger and larger.
_____ Part of the cell membrane bulges to start the bud.
A hydra that
is budding:
3. __________________________________:
A type of asexual reproduction where the parent organism breaks into pieces and the pieces (if large
enough) can grow into identical individuals.
Planaria
Sea Star (Star fish)
4. ______________________________:
A type of asexual reproduction where a multicellular portion of the parent plant becomes detached and
develops into a new plant