Atypical Trisomics In Aspergillus Nidulans

The morphological specificity of the typical trisomic colonies in Aspergillus nidulans has been extended to atypical trisomics as well. The atypical trisomics were morphologically distinguished and genetically characterized. The specificity has been found to be the function of the extra homologue. Various mechanisms for the origin of the atypical trisomics have been postulated and in a few cases, it has been confirmed that the translocation of a segment of linkage group I to linkage group VI and subsequent mis-segregation of chromosomes led to morphological anomaly of the atypical trisomics.