Reproduction
Asexual Reproduction
• A new organism produced from a single
parent
Q. Please circle one: In asexual
reproduction are the offspring genetically
different or genetically identical to the
parent
A. Genetically identical
Q. What type of cell division?
A. Mitosis or binary fission
Examples of Asexual Reproduction
Binary Fission
• Binary fission in prokaryotes for example bacteria
• Single circular DNA is copied then cell splits in
two
• No spindle
Mitosis- in eukaryotic cells ex, Amoeba and
Euglena. Chromosomes are replicated
then separated during Mitosis and
cytokinesis
• Occurs in unicellular and multicellular
organisms (simpler ones)
• Genetically Identical to parent
• Both binary fission and mitosis create two
new daughter cells
Budding
• A miniature version of the parent grows
out from the parent’s body, it then breaks
off and develops into an adult for Ex
hydra, sea anemones and yeast. It may
stay attached and form a colony Ex corals,
jelly fish
Vegetative Reproduction
 Genetically Identical individual arises from
parent
 Ex: strawberries, spider plant
 Can also come from bulbs
and tubers, ex potatoes are
stem tubers
Spores
 Algae, fungi and plants (moss), can reproduce
by produced genetically identical spores through
mitosis. Hyphae grow upwards form a
sporangium. Cells make spores by mitosis.
Taken away by wind or animals to create new
colonies
Fragmentation
• Parent organism splits into pieces which
can then grow into a new individual
• Ex flat worms, sea star
Sexual Reproduction
• Need two parents- Separate sexes
• Gametes: egg and sperm are produced in the
sex organs, Female → ovaries, Male  Testis
• Gametes made by the process of meiosis
• DNA from separate parents fuses upon
fertilization
• Genetically different individual to parents
Q. What are the advantages and disadvantages
of Asexual reproduction verses sexual
reproduction?
Asexual
- Advantage: only one parent needed
- Disadvantage: no genetic variation
Sexual
- Advantage: brings about greater variation
among the offspring= evolution
- Disadvantage: Need two parents
Quiz- Asexual Reproduction
Quiz
1. Which type of asexual
reproduction is shown?
• A. Budding
• B. Regeneration
• C. Spores
• D. Binary fission
2. Give an example of an organism
that can reproduce by vegetative
reproduction
3. Which type of asexual
reproduction is shown?
• A. Budding
• B. Regeneration
• C. Spores
• D. Binary fission
4. Which type of cell division do
bacteria do to create a new
individual
a.Mitosis
b.Meiosis
c.Binary fission
d.Nuclear fusion
5. Which pictures show identical
offspring generated by asexual
reproduction
• A 1 and 3 1.
2.
• B 2 and 3
• C 2 and 4
• D 3 and 4
3.
4.
6. If a eukaryotic cell starts off with 16
chromosomes and under goes asexual
reproduction, how many chromosomes
will be in each new cell produced?
A. 8
B. 16
C. 4
D. none
• 7. Asexual reproduction results in
individuals that are????
• A. genetically different to the parents
• B. genetically identical to their parent
• C. Have no genetic information
5. What type of fertilization is shown?
7. What type of fertilization is shown?