In lab 4 students analyzed pedigrees that showed patterns of inheritance that could not be explained by any one of the six modes of Mendelian inheritance covered in class. As part of the pedigree analyses they observed the incidence of incomplete penetrance and variable expressivity of traits.
Students also became familiar with concepts like genetic liability and recurrence risk, and were able to calculate the latter using specific methods that make use of the standard deviation of the population as a tool to infer such information.
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