Mendel’s Experiments© Copyright NewPath Learning. All Rights Reserved. 94-4424Visit www.newpathlearning.com for Online Learning Resources.Purebred ParentPurebred ParentPlant TraitsOffspringF1 Generation CrossThe (F1) plants were crossed and the displayed both forms of the characteristic. True-Breeding PlantsFor his experiments, Mendel used true-breeding plants, called . The of always had the . Mendel initially focused on the inheritance of single characteristics that only occurred in two different forms. For example, pea plants are either tall or short. P Generation CrossMendel tracked a over .First he crossed two that had different forms of a characteristic. This is called the parental, or Pgeneration. All the (F1) looked the same, displaying only one of the parental forms. enerationshorttalltalltallPgenerationF1shorttalltalltallF2short (25%)tall (75%)Mendel’s HypothesisMendel hypothesized that for each characteristic, plants inherit a from each parent. These units of information control the form of the in the . We now understand that these are and they exist in pairs called . The is known as a trait.seedshapepodcolorflowercolorplant heightF2 Generation(75%) of the F2 generation plants displayed the form as the , and 25% were the other form. These results were when he repeated the crosses for each characteristic. u eb eddd aaaaa e tttPurebreeeeeeeeeeeeedddddddddddddddddd PPPPPPPPPPPPPaaaaaaaaaaarenttttttttPlannnnnnnnnnnnntttttttttttttttt TTTTTTTTTTTTTTrrrrrrrrrrraaaaaaaaaaaaiiiiiiiiiitttttttttttttttssssssssssssspgOffspringThe (F1) plants were crossed and the displayed both forms of the characteristic. For his experiments, Mendelllllllllused true-breeding plants, called . The of always hhaaaaaaaaaaaaddddddddddddddd the ...... Mendel initially focusedddd on the inheritance ooooooooooooooffff ssssssssiiiiiiinnnnnnnggggggggggggle characteristics that oooooooooooooonnnnnnnnnnnnnnlllllllllyyyyyyyyyyyyyy ooccccccccuuuuuuuuuuuuurrrrrrrrrrrrrrrrrrreeeeeeeeeeeeeeedddddddddddddddddddddd in two different fooooooooorrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmssss. For eeeexxxxxxxxxxaaaaaaaaaammmmmmmmmmmmmmmmmmppppppppppppllllllllllleeeeeeeeeeeee,,,, pea plants are eithhhhheeeeeeeeeeeeeerrrrrrrrrr ttttttttttttttttaaaaaaaaaaaaaaalllllll orrrrrrrrrrr sssssssshhhhhhhhhort. Mendel ttttrrrrrrrrraaaaaaaaccccccccckkkkkkkkkkkkkkkkkkkkkkkkeeeeeeeeeeeeeeeeddd a over .FFiiiiiiiiiiiiiiirrrrrrrrrrrrrsssssssssssssstttttttttt he croooooooossssssssssssssseeeeeeeeeeeeeeedddddddddddddddd two that had different forms oooooooooooooooofffffffffffffffffff aaaaaaaaaaaaa characteeeeeeeerrrrrrrrrrriiiiiiiiiiiistic. This is called the parental, or Pggggggggggggggggggggggeeeeeeeeeeeeennnnnnnnnnnneeeeeeeeeeeeeerrrrrrrrrrrrraaaaaaaaaaaaaaaaaaatiooooooooooooooonnnnnnnnnnnnnnnn.... AAAAAAAAAAAAAAAAAAAAAAlllllllllllllllllllllllllllllllll ttttttttttthhe (F1) looked the same, dddddddddddddddddddddddiiiiiiiiiiiiiisssssplaying only one of the parental forms. generationshorttalltttttttttttttttttaaaaaaaaaaaaaalllllllllllllllllltttttttaaaaaaaaaaalllllllllllllllll()short (255555555555555%%%%%%%%%%%%%%%%%))))))))))))(((()ttttttttttttttttttttaaaaaaaaaaaaaaaalllllllllllllllllllllll ((((((((((75%)Mendel hypothesized that for each characteristic, plants inherit a from each parent. These units of information control the form of the in the . We now understand that these are and they exist in pairs called . The is known as a trait.seedshapepodcolorpflflflflflflflflflflfloooooooowerccccccccccccolorpppppppppplllllaaaaaaaaannnnnnt heiggggggggggghhhhhhhhhhhhhhttttttttttttt(75%) of the F2 generation plants displayed the form as the , and 25%were the other form. These results were when he repeated the crosses for each characteristic.
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