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| Description: Punnett square of the dihybrid cross shown in Figure 3.8. There are two combinations of dominant and recessive traits that can result in double heterozygotes in the F1 plants. One (left) involves plants with smooth yellow peas crossed to plants with wrinkled green peas. The other (right) is a cross between plants with wrinkled yellow peas and plants with smooth green peas. P‘ cross P‘ cross r—’% ssvy " , ssyy 9 55w 3 - 0 Smooth Yellow X wrinkled green wrinkled Yellow X Smooth green Gamete Gamete formation formation SY SY Fertilization @ Fertilization a F. = Smooth Yellow F‘cross SsVy X 5st sY @ SsYY $st Smooth Smooth Yellow Yellow 0 F2 G Sst Ssyy e Smooth Smooth n Yellow green 9 ,V . , _, K r a o) ,9 t ssYY ssVy i wrinkled wrinkled 0 Yellow Yellow n Q Sst Ssyy sst ssyy Smooth Smooth wrinkled wrinkled Yellow green Yellow green V F; Genotypic ratios F2 Phenotypic ratios 'IIE SSVY 2 [‘6 SSVy 9/.5 Smooth Yellow 2I15 SsYY ‘lis Sst I [‘5 SSyy :— 3/I55mooth green 1/15 Ssyy . "5 ”W :— 3/1swrinkledYellow 1/15 ssVy ‘lis SSyy — ‘liawrinkled green oesngags Lsam'ng. All Highls fieoerved. Picture Stats: Views: 248 Filesize: 198.83kB Height: 1500 Width: 778 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=44090 |