although an understanding of the phenotypic similarities and differences between individuals trisomic and tetrasomic for the same chromosome or chromosome segment is of considerable theoretical interest with regard to the relationship of the phenotypic features of aneuploid states to changes in the dosage of specific genes , the data obtainable from human cases of tetrasomy do not permit firm conclusions to be drawn .
C0002938
aneuploid
C0333689
tetrasomy