Derivative chromosome

[1] The term always refers to the chromosome that has an intact centromere.

Derivative chromosomes are designated by the abbreviation der when used to describe a Karyotype.

The aberrations must be listed from pter to qter and not be separated by a comma.

As for the initial string "46,XY", it only signifies that this translocation is occurring in an organism, which has this set of chromosomes, i.e. a human being.

An International System for Human Cytogenetic Nomenclature, Shaffer, L.G., Tommerup N. (eds); S. Karger, Basel 2005 This genetics article is a stub.

Human karyotype with annotated bands and sub-bands as used for the nomenclature of chromosome abnormalities . It shows 22 homologous autosomal chromosome pairs, both the female (XX) and male (XY) versions of the two sex chromosomes , as well as the mitochondrial genome (at bottom left).
Further information: Karyotype