人的 ABO 血型决定于 3 个等位基因 I A 、 I B 、 i 。通过抽样调查发现血型频率(基因型频率): A 型( I A I A ,I A i)=0.45;B 型( I B I B ,I B i)=0.13;AB 型( I A I B )=0.06;O 型( ii)=0.36. 试计算 I A 、 I B 、 i 这 3 各等位基因的频率。
【单选题】听力原文:W: Hello, Air Trailer. What can I do for you, Sir? M: Can I book a ticket to New York for next Friday, please? W: Sure, but all the tickets of direct flights from Beijing are sold out. Would you ...
【单选题】听力原文:M: Come in, come in! What can I do for you? W: Professor Johnson, are you giving your Advanced Geology course again next semester? M: Yes, I'm planning on it. W: I wonder if I could enroll in it....