reproduction. asexual reproduction _____ parent no union of gametes offspring genetically _______ to...
TRANSCRIPT
Asexual Reproduction
• _____ Parent• No union of gametes• Offspring genetically _______ to parents (“clone”)• Offspring results from _________ cell division• Don’t need to search for mate• No special reproductive cells or organs needed• Used in many protists, simple animals and many
plants
Binary Fission
• Parent organism divides in half by mitosis
• Cytoplasm ____________
• Ex: bacteria, algae, protozoa
http://www.youtube.com/watch?v=DY9DNWcqxI4&safe=active
• Remember the Phases of Mitosis?– # of chromosomes in parent and daughter
cells is the same• Interphase• Prophase• _________• Anaphase• Telophase
Budding• Parent organism ______
____________________• Cytoplasm __________
divided• New individuals develop
as a small outgrowth or bud in outer surface of organism
• Ex: yeast, hydra
Sporulation
• Single specialized cells produced by one parent germinate and grow
• Ex: – __________, _________
Regeneration• Ability of an organism to
re-grow lost body parts
• Usually found in __________ that have more undifferentiated cells than vertebrates
• Ex: – Planeria cut in half,
starfish, earthworm, lizard can escape from predator by losing its tail when caught
Asexual Plant Reproduction
– Most plants reproduce sexually using seeds– Many also reproduce asexually by means of
roots, stems and leaves– This is called _________________________
• Creates new plants genetically _______ to parent
http://www.youtube.com/watch?v=drcnTg7ZCoc&safe=active
Bulbs• Enlarged
underground stems
• Small new bulbs will sprout along side of main bulb and ____________
• Ex: daffodils, tulips, onions, garlic
Tubers
• Enlarged part of underground stems
• Have “___” which are tiny buds
• Ex: potatoes– If potato is cutup,
each new piece containing an eye can develop into a new plant
Runners• Stems that grow
sideways _____ the ground
• Where it touches ground, roots grow, creating a new plant
• Ex: strawberry
Rhizomes
• Stem grows sideways _____________
• Enlarged areas called _______ produce buds that grow upwards to form new plants
• Ex: bamboo, ginger
Artificial Vegetative Propagation
• Allow farmers to grow plants with desired traits exactly like parent and faster than from seeds
• Helpful is quickly propagating plants with a __________________– Ex: Can produce different varieties of
apples from the same tree
• Plants bearing ____________ can only be propagated this way– Ex: seedless oranges and watermelons
• Grafting: – remove stem or bud
from one plant and ___
___________________
________– “Scion” as attached to
“stock” plant but keeps it’s own genetic characteristics
• Vegetative Propagation: Asexual Plant Reproduction
• http://education-portal.com/academy/lesson/asexual-plant-reproduction-vegetative-propagation-and-bulbs.html
• Asexual Reproduction Song• http://www.youtube.com/watch?v=z7I0mw4ZDJ
A&safe=active