問題詳情
11.tWhat is the source of the extra chromosome 21 in an individual with Down syndrome?
(A)tDeletion in either parent
(B)t Inversion in either parent
(C)tPoint mutation of the chromosome
(D)tNondisjunction in either parent
參考答案
答案：D
統計：A:0,B:0,C:0,D:1,E:0
難度：計算中