Transcript Asexual Reproduction Question and Answer (PowerPoint)

Asexual Reproduction
Question and Answer
Ms. Cyr
What is Asexual Reproduction?
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Asexual reproduction is the
formation of a new individual
that is genetically identical to
the parent. (A clone)
Some advantages of asexual
reproduction are: only needing
one parent to reproduce), and
numerous offspring can be
produced with little effort.
To be classified as a eukaryote,
a cell must have a nucleus.
A prokaryote cell has no
nucleus, and only a single
chromosome.
Asexual Reproduction in Bacteria
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Binary fission is when
a parent divides so that
both new cells contain
a single chromosome.
An advantage to
having such a short
cell cycle is rapid
population growth.
(Not always good for
us!!)
Asexual Reproduction in Protists
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Protists are different
from bacteria because
they have a true
nucleus.
Mitotic cell division in
amoebas results in
offspring that are
genetically identical.
Asexual Reproduction in Fungi
Three types of organisms that are classified as fungi
are: moulds, yeast and mushrooms.
Hyphae grow over the surface of an organism and
into the bodies of other organisms to obtain food.
Three methods of asexual reproduction in fungi are:
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Fragmentation: a fragment breaks away and grows into a
new individual.
Budding: a copy of the nucleus is made; the new nucleus
moves into a tiny bud that forms in the cell wall. The bud
grows and eventually separates.
Spores: contains all genetic information. Leaves the
sporangium and can start a new colony.
Asexual Reproduction in Fungi
Continued
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A sporangium provides
a place for spores to
develop.
Spores travel by air
currents.
Apply your
knowledge: Covering
food in the fridge helps
keep spores out so
mould will not spread!
Asexual Reproduction in Animals
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Animals can be divided
into vertebrates (have a
backbone: human, dogs,
reptiles) and invertebrates
(no backbone: sponge,
jellyfish)
A planarian, if cut into two
pieces, will grow into 2
new worms. This happens
because of regeneration.
Other animals that can
reproduce asexually are
sponges and hydra.
Asexual Reproduction in Plants
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The meristem of a plant is
where cells that undergo
mitosis rapidly are located.
Meristematic cells repair
damaged cells and are the
site for asexual
reproduction.
Dandelions are difficult to
get ride of because when
you pull them out, there is
often a piece of root left
behind that can grow into
a new plant.
Asexual Reproduction in Plants
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Layering is when a
branch or limb from
the parent plant is
buried, and a new
plant grows from that
spot. (Strawberries)
Grafting is when stems
are grafted (attached)
to roots of another
plant, and start to
grow.