university of florida bsc2010 biology 1 ch15 slides

May 6th, 2015
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university of florida bsc2010 biology 1 ch15 slides

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BSC2010 LectureCh. 15Fig. 15-1Fig. 15-2P GenerationYellow-roundseeds (YYRR)YRYrRGreen-wrinkledseeds (yyrr)yryMeiosisFertilizationR YGametesyrAll F 1 plants produceyellow-round seeds (YyRr)F 1 GenerationRRyrYYLAW OF SEGREGATIONThe two alleles for each geneseparate during gameteformation.yrLAW OF INDEPENDENTASSORTMENT Alleles of geneson nonhomologouschromosomes assortindependently during gameteformation.MeiosisRrYyrRYyMetaphase I11RrYyrRYyAnaphase IRrYyMetaphase IIrRYy22YYGametesRR1F 2 Generation/4YRyrrr1/4YYyr1yr/4YryyRR1/4yRAn F 1 F 1 cross-fertilization339:3:3:1Fig. 15-3Fig. 15-4EXPERIMENTPGenerationF1GenerationAll offspringhad red eyesRESULTSF2Generation?Fig. 15-4EXPERIMENTPGenerationF1GenerationRESULTSF2GenerationAll offspringhad red eyesFig. 15-4cCONCLUSIONPGenerationXXw+w+wXYwF1GenerationEggsSpermw+w+w+ww+EggsF2Generationw+Spermw+www+w+wFig. 15-5XYFig. 15-644 +XY44 +XXParents22 +22 +or YXSperm+44 +XXor22 +XEgg44 +XYZygotes (offspring)(a) The X-Y system22 +XX22 +X76 +ZW76 +ZZ32(Diploid)16(Haploid)(b) The X-0 system(c) The Z-W system(d) The haplo-diploid systemFig. 15-7X NX NSperm X nX nY

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