Index >> Chromosomal Aberrations >> Interchromosomal Aberrations

Interchromosomal Aberrations
When breaks occur in non-homologous chromosomes and resulting fragments are interchanged by both of the non-homologous chromosomes, the inter-chromosomal or heterosomal aberrations occur. The inter-chromosomal aberration is of following type:
Translocation
Translocation involves the shifting of a part of one chromosome to another non-homologous chromosome. If two non-homologous chromosomes exchange parts, which need not be of the same size, the result is a reciprocal translocation. The reciprocal translocation may be of following types :
1. Homozygotic translocation-In homozygotic translocation normal meiosis occur and cannot be detetced cytologically. Genetically they are marked by altered linkage group by the fact that a gene with new neighbours may produce a somewhat different effect in its new location (position effect).