Definitions for "Allelic exclusion"
The expression in plasma cells of antibody genes found in only one member of a pair of homologous chromosomes. This ensures that the antibodies produced are all clones for that particular B cell.
In plasma cell heterozygous for an immunoglobulin gene, the selective action of only on allele.
A process whereby only one immunoglobulin light chain and one heavy chain gene are transcribed in any one cell; the other genes are repressed.