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5: Pedigrees and Populations

The basic concepts of genetics described in the preceding chapters can be applied to almost any eukaryotic organism.  However, some techniques, such as test crosses, can only be performed with model organisms or other species that can be experimentally manipulated. To study the inheritance patterns of genes in humans and other species for which controlled matings are not possible, geneticists use the analysis of pedigrees and populations.

Figure 5.1: Polydactyly (six fingers in this case) is an example of a human trait that can be studied by pedigree analysis. (Wikipedia-en:User:DRGNU23-GFDL)
 

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