Trisomy 21三染色体
trisomy 8三体
primary trisomy三体染色体
e trisomy三体综合征
trisomy detail三体性
trisomy monosomy三体型
partial trisomy部分三体型
trisomy-三体
-trisomy三体
N（名词） the condition of having one chromosome of the set represented three times in an otherwise diploid organism, cell, etc. Trisomy of chromosome 21 results in Down's syndrome 三染色体性