Download Asexual Reproduction in Bacteria, Protists, Fungi, and Animals

Asexual Reproduction in Bacteria, Protists, Fungi, and Animals
1) Go to: http://en.wikipedia.org/wiki/Reproduction
a) What is asexual reproduction?
Asexual reproduction is the formation of a new individual that has identical
genetic information to its parent
b) What is sexual reproduction?
a) Bacteria are prokaryotic. What does this mean?
Organisms with no true nucleus
b) What is the process of asexual reproduction in bacteria called? Briefly
explain this process.
 Bacteria reproduces asexually through a process called binary fission.
 Binary Fission is the process of the parent cell dividing, so that each new
cell contains a single chromosome, carrying a complete set of DNA
identical to the parent.
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a) Sketch the diagram of asexual reproduction in bacteria.
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a) What is a Protist and what is an example of one?
Amoeba, member of the Protista family, relies on asexual reproduction,
however unlike bacteria, the DNA of a Protista is in a true nucleus.
b) What distinguishes Protists from bacteria?
They have a nucleus
2) Go to: http://www.enchantedlearning.com/subjects/protists/amoeba.shtml
An amoeba is an example of a protist.
a) How do amoebas reproduce? Through mitosis
b) Sketch and label a diagram explaining how amoeba reproduce.
3) Go to: http://www.biology4kids.com/files/micro_fungi.html
a) What is a basic, well-known example of fungi?mushrooms
b) How do fungi reproduce ? It was made of thin layer or filaments called
hyphae and it grew over the surface (soil) and in the bodies of other
organisms (compost) to obtain food.
c) Fungi reproduce in three different ways: through the process of
fragmentation, budding and spores.
d)
e) What are hyphae?
f) Sketch and label a diagram explaining how fungi reproduce
 Fragmentation—A small piece or fragment, breaks away from the main
mass of hyphae and grows into a new individual
 Budding—A copy of the nucleus
is made first, then a tiny bud begins
to form on the cell wall. This bud,
containing the new nucleus, continues
to grow larger, until it breaks away to become an independent cell.
 Spore—This is a reproductive cell that can grow into a new individual cell
through miotic cell division. They are stored in a case called a
sporangium. When mature they take on a characteristic colour such as
black, yellow, blue or red.
a) State the 4 common forms of asexual reproduction in animals and explain
each kind. Sketch and label a description image to describe each type of
asexual reproduction
Regeneration
 Planaria are a type of flat worm.
 They reproduce asexually by dividing in two and regenerating the parts
they are missing.
 Part that retains the head grows a new tail.
 Part that retains the tail grows a new head.
Budding
 Some animals reproduce asexually by budding.
 A cell, usually near the base of the organism undergoes mitosis and cell
division repeatedly to produce a new group of cells.
 When the bud has completed development it detaches as a
new organism.
Parthenogenesis, ") is a form of asexual reproduction in which growth and
development of embryos occur without fertilization. In animals, parthenogenesis
means development of an embryo from an unfertilized egg cell
Whiptail lizard
Fragmentation:
4) What are the advantages of asexual reproduction over sexual
reproduction? What are the disadvantages.
Fast and efficient, know what you’re going to get DNA wise,
Disadvantages; lack of genetic variation, mutation uncommon, not as good at
adaptation to changing environments.