Reminder Mitosis Meiosis Forms sex cells sperm and eggs ½ the number of chromosomes compared to the parent cell Genetically identical to parent cell Responsible for growth differentiation and asexual reproduction ID: 620093
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Slide1
Types of Asexual ReproductionSlide2
Reminder:
Mitosis
Meiosis
Forms sex cells (sperm and eggs)
½ the number of chromosomes compared to the parent cell
Genetically identical to parent cell
Responsible for growth, differentiation, and asexual reproduction
One replication and two divisions
One replication and one division
4 daughter cells formed
2 daughter cells formedSlide3
Asexual Reproduction
A reproduction method that only needs one individual
Involves the process of mitosis.
Offspring are genetically identical to parent
Different methods used by different species
Binary Fission
FragmentationBuddingMitosis
Spore
RegenerationSlide4
Binary
Fission
Parent divides into
2 equal
halves after the nucleus replicates
No parent remains - 2
daughter cells grow to normal sizeOccurs in bacteria
,
protozoa, and
algaeSlide5Slide6Slide7
Budding
Parent organism divides into
2 unequal
halves
Daughter cell forms from
bud or outgrowth off parent
Buds may break off
or remain attached and form a colony
Occurs in
hydra
and yeast
Slide8Slide9Slide10
Sporulation (
spore
forming)
Production of many
spores
in a special spore producing structure(spore case)Spores are
microscopic, specialized cells, containing nucleus and
cytoplasm
within a hard case
Occurs in molds
and
ferns Slide11Slide12Slide13
Regeneration
Ability to
grow back
missing parts
The more
complex the organism, the
harder it is to regenerate
Occurs in simple organisms such as starfish
and
flat wormSlide14Slide15Slide16
Humans?Slide17
Fragmentation
A piece (
hyphae
) of the parent
breaks off and is moved to another locationA new individual develops from this fragment
Occurs in fungi (mushrooms)Slide18
Vegetative Propagation
A
piece
of a body of a multicellular organism gives rise to a
new
organismCommon in
plants - using stems, leaves, or roots
Can occur naturally
or
artificiallySlide19
Natural Vegetative Propagation
Bulb-
Short underground stem with stored food & fleshy leaves
Ex. Onion, tulip
Corm-
Short underground stem with stored food Ex. Water chestnut
Tuber- Enlarged underground stem
Ex. potato
Runner-
(stolon) horizontal stem with buds along ground’s surface
Ex. strawberry
Rhizome- Underground horizontal stem
Ex. gingerSlide20
Tuber
Bulb
Corm
Rhizome
RunnerSlide21
Artificial Vegetative Propagation
Cutting
- use
part
of plant to reproduce (Ex.Spider plant)
Layering
- stem is bent over and covered with
soil will root and form
new pla
nt (Ex. raspberry)
Grafting
- stem or bud of one plant i
s joined
to another plant permanently (Ex. Seedless fruit tree)Slide22
Layering
Grafting
scion
stockSlide23
1 Tree 40 Fruits