12. Glossary

Just as birds have wings, man has language. -- George Henry LewesThis chapter provides a glossary of terms.

**ancestor loss coefficient**- See: pedigree completeness.
**coefficient of ancestral inbreeding**- The probability that an individual jas inherited an allele that has undergone inbreeding in the past at least once.
**coefficient of inbreeding**- Probability that two alleles selected at random are identical by descent.
**coefficient of partial inbreeding**- The probability that the alleles at an arbitrary locus in an individual are identitical-by-descent, and that the alleles were derived from an allele in a particular founder.
**coefficient of relationship**- Proportion of genes that two individuals share on average.
**effective ancestor number**- The number of equally-contributing ancestors, not necessarily founders, needed to produce a population with the heterozygosity of the studied population [Boichard, Maignel, and VerrierBoichard et al.1997].
**effective founder number**- The number of equally-contributing founders needed to produce a population with the heterozygosity of the studied population [LacyLacy1989].
**effective population size**- The effective population size is the size of an ideal population that would lose heterozygosity at a rate equal to that of the studied population [Falconer and MacKayFalconer and MacKay1996].
**founder**- An animal with unknown parents that is assumed to be unrelated to all other founders.
**internal report**- A PyPedal() report that is intended for use by other PyPedal() procedures, such as plotting routines, and not for printing.
**numerator relationship matrix**- Matrix of additive genetic covariances among the animals in a population.
**pedigree**- A PyPedal pedigree consists of a Python list containing instances of PyPedal
`NewAnimal()`objects. **pedigree completeness**- The proportion of known pedigree information for an arbitrary number of generations.
**renumbering**- Many calculations require that the animals in a pedigree be ordered from oldest to youngest, with sires and dams preceding offspring, and renumbered starting with 1. This is a computational necessity, and results in an animal's ID (
`animalID`) being changed to reflect that animal's order in the pedigree. All animals have their original IDs stored in their`originalName`attribute. **reordering**- The process of arranging animals in a pedigree so that parents appear before their offspring; this is a necessary step in renumbering a pedigree.

- ... terms.
^{12.1} - Please let me know of any additions to this list which you feel would be helpful.