ppt asexual vs sexual #3 1

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

CloningCloning

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

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