chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell
例句
用作名词 (n.)
An aneuploid state in which a third homologous chromosome is present in addition to the normal autosomal pair is called trisomy. 除了正常染色体对以外,还存在有第二种同源染色体的非整倍体状态,被称为三体性。