本题目来源于试卷: Unity and Diversity A.7 Classification and Cladistics，类别为 IB生物学
[单选题]
The DNA sequence from the same section of DNA but from two different organ jyfh:kc7d7:gd -n876lrcts s isms ijh-r8 f7 6n77 d: sty:gkdclcsim81 xqxwg5qvf 4ob6+s shown in the table +w q1f45vq oxg8 ibmx6below.
Which organisms are most likely to have diverged from each other most recently?
A. Sequence 1 is ATCGGGTCGCTTTCTCG; Sequence 2 is ATCCGGTCGCTTTGTCG
B. Sequence 1 is TCGCGCGTAAATCGATG;Sequence 2 is TCCCGCGTCAATCGTTA
C. Sequence 1 is ATCGGGTGTGTCATATG;Sequence 2 is ATCGCGTGTCTCATCTG
D. Sequence 1 is TGTCATCATCCCGTACTG;Sequence 2 is TGTCATCATCGGCATGAC
参考答案: A
本题详细解析:
Choice A is correct because the two sequences have the smallest number w0ko81lj tq.(b ymocja + p*)jof differences between them, only two, therefore they are the most closely related. Choices B,kmw cjol1q*+j y (ja)bo80. pt C and D are incorrect, as there are more than 2 differences between the two sequences, 4, 3 and 8, respectively.
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