Abstract
In the third lesson, an alternative approach will be presented, using a technology to search for associations between genetic loci and a particular morphological trait, in this case tail length. This more global and, therefore, less hypothesis-biased approach illustrates a more relative view of the relationships between DNA and shapes, considering that only parts of the traits under consideration can be associated with gene variations, and that several of these variations are necessary to vary each of these " complex traits ".
