february 6 2017 presentation - cusd80.com
TRANSCRIPT
Admit Ticket
Take notes on “Cell Division and the Cell Cycle” https://www.youtube.com/watch?v=Q6ucKWIIFmg
DUE TODAY
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HOMEWORK: Student Weekly Grade Tracking #23
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DUE TODAY
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CLASSWORK: OPEN BINDER/NOTE TEST #3 (2ND HOUR 2/7/16)
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DUE TODAY(2ND)
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CLASSWORK: Punnet Square Exercises (Binder) CLASSWORK: Bikini Bottom Genetics (TURN IN)
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DUE 2/13/17
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HOMEWORK: Student Weekly Grade Tracking #24
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DUE 2/13/17
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EXTRA CREDIT: CELL ANALOGY PROJECT
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Open Binder/Note Test #3
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©Fall2005,PflugervilleISD,7thGrade
copyrightcmassengale
16
Gregor Mendel (1822-1884)
The Father of Genetics
©Fall2005,PflugervilleISD,7thGrade
GregorJohannMendel
▪Austrianmonk▪Studiedtheinheritanceoftraitsinpeaplants▪Developedthelawsofinheritance▪Mendel'sworkwasnotrecognizeduntiltheturnofthe20thcentury
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©Fall2005,PflugervilleISD,7thGrade
GregorJohannMendel
▪Between1856and1863,Mendelcultivatedandtestedthousandsofpeaplants
▪Hefoundthattheplants'offspringretainedtraitsoftheparents
copyrightcmassengale 18
©Fall2005,PflugervilleISD,7thGrade
copyrightcmassengale
19
▪Mendelstatedthatphysicaltraitsareinheritedas“particles”
▪Mendeldidnotknowthatthe“particles”wereactuallyChromosomes&DNA
ParticulateInheritance
©Fall2005,PflugervilleISD,7thGrade
Whypeas,Pisumsativum?
▪Canbegrowninasmallarea▪Producelotsofoffspring▪Producepureplantswhenallowedtoself-pollinateseveralgenerations▪Canbeartificiallycross-pollinated
copyrightcmassengale 20
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
• Mendeltested7traits:1. Flowercolor2. Flowerposition3. Seedcolor4. Seedshape5. Podshape6. Podcolor7. Plantheight
http://www.fieldmuseum.org/exhibits/traveling_mendel.htm
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
• Mendelcrossedflowersthatweretrue-breedingforeachcharacteristic.
• Hecrossedapurple(PP)floweredplantwithawhite(pp)floweredplant.(ParentGeneration)
http://biology.kenyon.edu/courses/biol114/KH_lecture_images/Mendel/Mendel.html
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
• Thefirstgeneration(F1)ofplantsallhadpurpleflowers.
• Wheredidthewhitecolorgo??
(Pp)
(Pp)
(Pp) (Pp)
PurpleParent(PP)
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
• Mendeltooktwoofhisfirstgeneration(F1xF1)purplefloweredplantsandcrossedthemtogether.
• Inthesecondgeneration(F2)hehad3purplefloweredplants,and1whitefloweredplant.
(PP) (Pp)
(Pp) (pp)
PurpleParent(Pp)
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
• Mendelnoticedinthefirstgeneration,allofthewhiteflowersseemedtodisappear.
• Hecalledthisarecessivetrait.• Thewhitecolorfadedintothebackgroundatfirst.
• Itshowedupinthenextgenerationwhenhepollinatedtheflowers.
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
• Thecolor(purple)thatseemedtomaskovertherecessivecolorwasnamedthedominanttrait.
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
• Mendelwasresponsibleforfiguringoutthateachplantcarriedtwosetsofinstructionsforeachcharacteristic(onefromthe“mom”andonefromthe“dad”).
• Likemanyscientists,hisworkwasnotaccepteduntilafterhisdeath.
©Fall2005,PflugervilleISD,7thGrade
Let’sReview
1.Ifyoucrossedatrue-breedingblackrabbitwithatrue-breedingwhiterabbit,alloftheoffspringwouldbeblack.Whichtraitisdominantinrabbits:blackfurorwhitefur?
2.Whichtraitisrecessive?
©Fall2005,PflugervilleISD,7thGrade
Answer
• Thetraitforblackfurisdominantoverthetraitforwhitefur.Thewhitefurtraitisrecessive.
http://www.buckeyevalleyfarms.freeservers.com/photo.html
(Bb)(Bb)
(Bb) (Bb)
BlackRabbit(BB)
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
Vocabulary1. Heredity-thepassingoftraitsfrom
parenttooffspring.2. Self-pollinate-Aplantisoftenableto
pollinatebyitselfbecauseitcontainsboththemaleandfemalereproductivestructures.Thisonlyrequires1parent.
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
3.True-breeding-alloftheoffspringwillhavethesametraitastheparentwhenself-pollinated
4. First-generation-theveryfirstsetofoffspringfromtwoparents
5. Dominanttrait-thetraitobservedwhenatleastonedominantalleleforacharacteristicisinherited
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
6.Recessivetrait-atraitthatisapparentonlywhentworecessiveallelesforthesamecharacteristicareinherited
7. Genes-asegmentofDNAthatcarrieshereditaryinstructionsandispassedfromparenttooffspring
8. Alleles-multipleformsofthesamegene
©Fall2005,PflugervilleISD,7thGrade
MendelandHisPeas
9. Genotype-anorganismsinheritedcombinationofalleles
10.Phenotype-anorganismsinheritedappearance