has_sequence_attribute aneusomic chromosomal part Aneusomic chromosomal parts are examples of "partial aneuploidy" as described in http://en.wikipedia.org/wiki/Aneuploidy: "The terms "partial monosomy" and "partial trisomy" are used to describe an imbalance of genetic material caused by loss or gain of part of a chromosome. In particular, these terms would be used in the situation of an unbalanced translocation, where an individual carries a derivative chromosome formed through the breakage and fusion of two different chromosomes. In this situation, the individual would have three copies of part of one chromosome (two normal copies and the portion that exists on the derivative chromosome) and only one copy of part of the other chromosome involved in the derivative chromosome." Novel sequence features gained in a genome are considered to be sequence alterations, including aneusomic chromosome segments gained through unbalanced translocation events, entire aneusomic chromosomes gained through a non-disjunction event during replication, or extrachromosomal replicons that becoome part of the heritable genome of a cell or organism. aneusomic chromosomal subregion/segment aneuploid chromosomal segment A large deletion or terminal addition of part of some non-homologous chromsosome, as the result of an unbalanced translocation. partial aneusomic chromosomal element aneusomic chromosome part sequence_alteration exploratory term