2010_slides_week8_Ch14 - BSC2010 Lecture Week 8 Click to...

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Click to edit Master subtitle style 9/5/11 BSC2010 Lecture Week 8 Ch. 14
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9/5/11 Blending Hypothesis
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9/5/11 Fig. 14-2a Stame ns Carp el Parental generati on (P) TECHNIQU E 1 2 3 4
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9/5/11 Fig. 14-2b First filial gener- ation offspri ng (F1) RESULT S 5
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9/5/11 Fig. 14-3-2 EXPERIMEN T P Generation (true- breeding parents) Purpl e flowe rs Whit e flowe rs l F1 Generation (hybrids) All plants had purple flowers
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9/5/11 Fig. 14-3-3 EXPERIMEN T P Generation (true- breeding parents) Purpl e flowe rs Whit e flowe rs l F1 Generation (hybrids) All plants had purple flowers F2 Generation 705 purple- flowered plants 224 white- flowered plants
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9/5/11 Table 14-1
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9/5/11 Fig. 14-4 Allele for purple flowers Homologou s pair of chromosom es Locus for flower-color gene Allele for white flowers
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9/5/11 Fig. 14-5-1 P Generatio n Appearan ce: Genetic makeup: Gamet es: Purple flowers White flowers P P P p p p
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9/5/11 Fig. 14-5-2 P Generatio n Appearan ce: Genetic makeup: Gamet es: Purple flowers White flowers P P P p p p F1 Generatio n Gamet es: Genetic makeup: Appearan ce: Purple flowers P p P p 1 / 2 1 / 2
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9/5/11 Fig. 14-5-3 P Generatio n Appearan ce: Genetic makeup: Gamet es: Purple flowers White flowers P P P p p p F1 Generatio n Gamet es: Genetic makeup: Appearan ce: Purple flowers P p P p 1 / 2 1 / 2 F2 Generatio n Spe rm Eg gs P P P P P p p p P p p p 3 1
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9/5/11 Fig. 14-6 Phenotyp e Purp le Purp le 3 Purp le Genoty pe 1 Whi te Ratio 3:1 (homozygo us) (homozygo us) (heterozygo us) (heterozygo us) P P P p P p p p Ratio 1:2:1 1 1 2
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9/5/11 Fig. 14-7a Dominant phenotype, unknown genotype: PP or Pp ? Predictio ns Recessive phenotype, known genotype: pp p If PP If Pp o r Spe rm Spe rm p p p p P P P p Eg gs Eg gs P p P p P p P p P p P p p p p p TECHNIQ UE
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9/5/11 Fig. 14-7 TECHNIQU E RESULT S Dominant phenotype, unknown genotype: PP or Pp ? Predictio ns Recessive phenotype, known genotype: pp p If PP If Pp o r Spe rm Spe rm p p p p P P P p Eg gs Eg gs P p P p P p P p P p P p p p p p o r All offspring purple 1/2 offspring purple and 1/2 offspring white
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9/5/11 Fig. 14-8a EXPERIMEN T P Generatio n F1 Generation Predicti ons Game tes Hypothesis of dependent assortment YY RR y y r r Y R y r Y y R r Hypothesi s of independe nt assortmen t o r Predicted offspring of F2 generatio n Sp er m Sper m Y
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