nonhomologous chromosomes

non·ho·mol·o·gous chro·mo·somes

chromosomes that are not members of the same pair.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
A balanced reciprocal translocation is an exchange of material between two nonhomologous chromosomes, without loss or gain of material and balanced translocation carriers are usually healthy and phenotypically normal.
During discontinuous DNA synthesis of similar intermingled DNA sequences of nonhomologous chromosomes, unpaired single-strand regions (located at the telomeric ends next to centromeres), are able to occasionally base-pair.
Individuals with reciprocal translocation (2-way exchange of material between 2 nonhomologous chromosomes, with no net gain or loss of genetic material) are phenotypically normal unless the break-points interrupt or modify the function of a gene or genes (1).
According to random probability, we expect about five-sixths of the differences between CS-B lines and TM-1 to be due to the substituted chromosome or segment, and the remaining sixth due to remnant 3-79 genes in nonhomologous chromosomes that was inadvertently retained during backcrossing and inbreeding.
These translocations, in which nonhomologous chromosomes exchange DNA sections, result in the repositioning of a gene (located at the chromosome breakpoint) at a foreign locus and in (1) aberrant expression of the gene or (2) expression of a novel from of the gene product.
Similar, homologous chromosomes pair whereas dissimilar, nonhomologous chromosomes do not.