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Biology B
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ReproductionReproduction
General BiologyGeneral Biology
Recall the Two Important Recall the Two Important Questions we asked….Questions we asked….
What is the significance of What is the significance of Mitosis?Mitosis?
Why do Chromosmes come in Why do Chromosmes come in Pairs?Pairs?
Asexual vs Asexual vs SexualSexual
ReproductionReproduction
ASEXUAL ASEXUAL REPRODUCTIONREPRODUCTION
One ParentOne Parent Genetic Continuity – Identical Genetic Continuity – Identical
OffspringOffspring Many Offspring – QuicklyMany Offspring – Quickly Less Maturation TimeLess Maturation Time Nuclear Division = MITOSISNuclear Division = MITOSIS
Types Types of of
Asexual Asexual ReproductionReproduction
Binary FissionBinary Fission (splitting in two)(splitting in two)
Examples include: Examples include: bacteria, protistsbacteria, protists
BBUUDDDDIINNGG
CytoplasmCytoplasmDividesDivides
UnequallyUnequallyExamples:Examples:
yeast, hydrayeast, hydra
bud
Multicellular Budding -hydraMulticellular Budding -hydra
Multicellular Budding - Multicellular Budding - spongesponge
Spore FormationSpore Formation
RegenerationRegeneration
Re-growing lost partsRe-growing lost parts
Examples: starfish, lizard Examples: starfish, lizard tails, planariantails, planarian
PlanarianPlanarian
Vegetative PropagationVegetative Propagation
Plants growing new plants from parts Plants growing new plants from parts of oldof old
New plants are clonesNew plants are clones
More about cloning More about cloning during geneticsduring genetics
Sexual Sexual ReproductionReproduction
Requires two parents (cells)Requires two parents (cells) Union of special cells called Union of special cells called
GAMETESGAMETES Sperm and EggsSperm and Eggs Provides GENETIC VARIATIONProvides GENETIC VARIATION
Gametes~ specialized Gametes~ specialized sex cellssex cells
Examples:Examples:Egg & SpermEgg & Sperm
Pollen & OvumPollen & Ovum
HermaphroditesHermaphrodites
Organisms with Organisms with ovaries and testesovaries and testes
Produce both eggs Produce both eggs and sperm.and sperm.
Earthworms have testes and Earthworms have testes and ovariesovaries
endend