2015-Asexual and Sexual Reproduction Notes

8/19/2019 2015-Asexual and Sexual Reproduction Notes

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AsexualAsexual&&

SexualSexualReproductionReproduction


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AsexualAsexualReproductionReproduction Type of reproduction in which aType of reproduction in which a

new organism is produced fromnew organism is produced fromONEONE parent and the ospring isparent and the ospring is

identicalidentical to the parent.to the parent.

Occurs in most plantsOccurs in most plants

!acteria protists and low!acteria protists and lowin"erte!rates.in"erte!rates.


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AsexualAsexualReproductionReproduction One parentOne parent

OspringOspringare identicalare identical

to the parents.to the parents.One #arent

$denticalOspring


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AsexualAsexualReproductionReproduction Ad"antages and %isad"antages ofAd"antages and %isad"antages of

Asexual ReproductionAsexual Reproduction Ad"antages $dentical to parent soAd"antages $dentical to parent so

will get allwill get all good

good characteristicscharacteristics..

%isad"antages $dentical to parent%isad"antages $dentical to parent

so will also get !ad characteristicsso will also get !ad characteristicsand is less a!le toand is less a!le to adapada

pt to thet to the

en"ironmenten"ironment..


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AsexualAsexualReproductionReproduction Types of AsexualTypes of Asexual

ReproductionReproduction RegenerationRe

generation organism uses organism uses

cell di"ision tocell di"ision to re'growre'

grow !ody!ody

parts.parts. Example( star)sh salamanderExample( star)sh salamander


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AsexualAsexualReproductionReproduction Types of Asexual ReproductionTypes of Asexual Reproduction

*egetati"e*e

getati"e #ropagation#ro

pagation results in results ina new plant that is geneticallya new plant that is genetically

identicalidentical to the parent plant +ato the parent plant +a

clone,.clone,.

Examples( straw!erry plantExamples( straw!erry plant"egeta!les and crops."egeta!les and crops.


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AsexualAsexualReproductionReproduction Types of AsexualTypes of Asexual

ReproductionReproduction -udding-udding organism that produces organism that produces

a !ud thata !ud that !reas!reas awayaway to li"e onto li"e on

its own.its own. Example( hydraExample( hydra


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AsexualAsexualReproductionReproduction Types of Asexual ReproductionTypes of Asexual Reproduction

-inary-inary /ission/ission used !y used !y!acteria an organism!acteria an organism

whose cells do notwhose cells do not

contain a nucleuscontain a nucleus copycopy

thenthen di"idedi"ide into twointo twoidentical organismsidentical organisms Example( !acteriaExample( !acteria


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SexualSexualReproductionReproduction TwoTwo parentsparents

Ospring areOspring areaa com!inationcom!ination ofof !oth!oth parentsparents

and areand are

thereforetherefore dierentdierent from each parent.from each parent.

uni0ue 1 di"erseospring

Two#arents


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SexualSexualReproductionReproduction Ad"antages and %isad"antages ofAd"antages and %isad"antages of

Asexual ReproductionAsexual Reproduction Ad"antages "ariety and1orAd"antages "ariety and1or di"ersitydi"ersity ofof

ospring +color shape si2e intelligenceospring +color shape si2e intelligence

a!ility etc., 3ore a!le toa!ility etc., 3ore a!le to adaptadapt toto

en"ironmental changes.en"ironmental changes.

%isad"antages uni0ueness sometimes%isad"antages uni0ueness sometimestraits needed fortraits needed for sur"i"alsur"i"al are notare not passedpassed on.on.


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SexualSexualReproductionReproduction Types of Sexual ReproductionTypes of Sexual Reproduction

#lants#lants when the reproducti"e cells when the reproducti"e cellsof one plant fertili2eof one plant fertili2e

+pollinate, the+pollinate, the

reproducti"e cellsreproducti"e cells

of another plant. This producesof another plant. This producesseeds that can growseeds that can grow

into a new plant.into a new plant.


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SexualSexualReproductionReproduction Types of Sexual Reproduction.Types of Sexual Reproduction.

AnimalsAnimals when the reproducti"e when the reproducti"ecells of onecells of one

animal fertili2eanimal fertili2e

the reproducti"e cells of anotherthe reproducti"e cells of another

animal. Thisanimal. Thisproduces aproduces a

!a!y +em!ryo,.!a!y +em!ryo,.

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2015-Asexual and Sexual Reproduction Notes