1.4 Overview of the pedigrees used in the examples

Except for some small pedagogical pedigrees for pedcheck under `Pedcheck', two main pedigree files are used to illustrate the usage of MORGAN programs.

File `jv_rep.ped', located under `IBD', is composed of two replicates of the JV pedigree. The 30-individual 5-generation JV pedigree derives from a real study of a rare recessive trait by Goddard et al (1996 AJHG 58: 1286-1302).

The other pedigree in `ped73.ped', located under `MORGAN_Examples', consists of three components and 73 individuals: component one has 47 individuals from 6 generations, component two 11 individualus from 3 generations, and component three 15 individuals from 3 generations. In general, individuals from later generations are observed. The three components are displayed in `ped47.pdf', `ped11.pdf' and `ped15.pdf', which are located under `PedInfo'.