Huntington's Disease Pedigree

Figure 1. This is a family pedigree taken from a single family. This was taken from a paper by Neal G. Ranen et al., Am. J. Hum. Genet. 57:593-602. 1995. The age of onset of symptoms (O) and the number of trinucleotide repeats (R) are indicated below the appropriate individuals. Symbols with diagonal lines through them mean the person is dead.