右图为一白化病(用A,a表示)家系谱,II3为白化病者。分析回答:
I1.I2的基因型是()、()
参考答案:Aa;Aa
—Have you been to new Sports Center is just opened in town?
—No, not yet. [ ]
A. where
B. who
C. that
D. when
1,3,7,13,21,31,( )
A.43
B.35
C.41
D.51