http://media-2.web.britannica.com/eb-media/84/784-004-C9BAE345.gifFamily pedigrees are used to track a genetric trait throughout a family. This pedigree tracks the presence of Hemophilia A throughout a family. Circles represent famales, squares represent males. Light blue represents individuals who do NOT have hemophilia A, dark blue represents individuals who do have hemophilia A. The Shapes that are half light blue, half dark blue indicate individuals who carry the gene for hemophilia, but do not actualy express it.
Geneticists use these charts to try and identify instances, and predict the likelithood of an offspring having that trait.
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