types of asexual reproduction - quia€¦ · ppt file · web view · 2018-03-22... production of...
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Types of Asexual Reproduction
3/17/2008
Do Now:Meiosis MitosisForms 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 formed
Asexual Reproduction
• Involves the process of
• Offspring are genetically to parent
mitosis
identical
Binary Fission
• Parent divides into halves after nucleus replicates
• No parent remains daughter cells grow to normal size
• Occurs in , , and
2 equal
2
bacteria protozoaalgae
Budding
• Parent organism divides into halves
• Daughter cell forms from outgrowth or off parent
• Buds may or remain attached and form a
2 unequal
budbreak offcolony
• Occurs in andhydra yeast
Sporulation (spore forming)
• Production of many in a special spore producing structure ( )
• Spores are , specialized cells, containing and within a hard case
• Occurs in , , and
sporesspore case
microscopicnucleus cytoplasm
molds mushroomsferns
Regeneration
• Ability to back missing parts• The more the organism, the
it is to regenerate• Occurs in simple organisms such as
and
growcomplex
harder
starfish flat worm
Vegetative Propagation
• of a body of a multicellular organism gives rise to a organism
• Common in - using stems, leaves, or roots
• Can occur or
piecenew
plants
naturally artificially
Natural Vegetative Propagation• Bulb-
• Corm-
• Tuber-
• Runner-
• Rhizome-
Short underground stem with stored food & fleshy leaves Ex. Onion, tulipShort underground stem with stored food Ex. Water chestnutEnlarged underground stem Ex. potato
(stolon) horizontal stem with buds along ground’s surface Ex. strawberry
Underground horizontal stem
Ex. ginger
Tuber
Bulb
CormRhizome
Runner
Artificial Vegetative Propagation
• Cutting- use of plant to reproduce (Ex. )
• Layering- stem is over and covered with will root and form plant (Ex. )
• Grafting- stem or bud of one plant is to another plant
(Ex. )
partSpider plant
bent soilnew raspberry
joined
Seedless fruit treepermanently
Layering Grafting
scion
stock