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Modélisation et diagnostic des conceptions d'élèves de niveau seconde sur l'information génétique, lors de l'élaboration d'expérience à l'aide de LabBrook

Abstract : The aims of this work (modelisation and diagnostic) are realised thanks to the design and the experimentation of a didactical situation with the design of an experiment that have the following problem to solve: How can we modify the genetics information? The situation designed to obtain the students' productions is on the web site LabBook and it is organised in some tools, including COPEX, which scaffold the activity of experimental procedure's design. This situation proposes an environment with the nine biological levels where students can place the genetics information: Environment, Organism, Organ, Cell, Nucleus, Caryotype, Chromosome, Gene and DNA. Those levels were determined thanks to the study of researches on the students' difficulties in genetics and thanks to the epistemological analysis of the reference knowledge. The situation was proposed after an a priori analysis in the theoretical framework of TSD of Brousseau (1998) and the cK¢ model of Balacheff (1995). The students' productions analysis give us results about the biological level where they realise their experiment, about the biological object used in this level and the method of genetics information's modification. We find more answers at levels Chromosome, Gene and DNA. About biological objects, the most used are those, which give their name to the level, and the method of modification is exchange, substitution. The cK¢ model is used too formalise conceptions obtained from the students productions. We modelised nine conceptions, which represent the conceptions of the genetics information modification for 50 percents of students.
Keywords : Ckc EIAH Biology Didactic
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Gwenda-Ella Chapel. Modélisation et diagnostic des conceptions d'élèves de niveau seconde sur l'information génétique, lors de l'élaboration d'expérience à l'aide de LabBrook. Médecine humaine et pathologie. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENS011⟩. ⟨tel-00721782⟩

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