["Modula-2 Algebra System", H. Kredel, Proc DISCO 90 Capri, LNCS 429, Springer 1990, pp270-271].
Websites:
Biology Dictionary
Definition:
The use of markers to follow the inheritance of genes, particularly those genes which cannot be readily identified. Selection of a marker flanking a gene of interest, allows selection for the presence (or absence) of a gene in a new progeny.