A list with the following elements:
PedSummarya 2-column matrix with basic summary statistics, similar
  to what used to be returned by Pedantics' pedStatSummary (now
  archived on CRAN). First column refers to the complete pedigree, second
  column to SNP-genotyped individuals only. Maternal siblings sharing a dummy
  parent are counted in the 2nd column if both sibs are genotyped, but not if
  one of the sibs is a dummy individual.
  ParentCounta 2x3x2x4 array with the number of assigned parents,
  split by D1: genotyped vs dummy individuals; D2: female, male and
  unknown-sex individuals; D3: dams vs sires; D4: genotyped, dummy, observed
  vs no parent
  GPCounta 2x4x4 array with the number of assigned grandparents,
  split by D1: genotyped vs dummy individuals; D2 Maternal grandmother (MGM),
  maternal grandfather (MGF), paternal grandmother (PGM), paternal
  grandfather (PGF); D3: genotyped, dummy, observed vs no grandparent
  SibSizea list with as first element a table of maternal sibship
  sizes, and as second element a table of paternal sibship sizes. Each table
  is a matrix with a number of rows equal to the  maximum sibship size, and 3
  columns, splitting by the type of parent: genotyped, dummy, or observed.