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:* j,rtkd *n5ej;w *t kkzai9nq*7,(aalecrmk :aoye ;bu-1 d the same section of DNA but from two different organisms i m, l;r(7*akc: au -eqobdya1es shown in the table below.
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 bw 54j c5z:5w y(oaiipmecause the two sequences have the smallest number of differences between them, only two, therefore they are the most closely related. Choices B, C and D are incorrect, as there are more than 2 differeip:(5a5 wz54 mjyiwocnces between the two sequences, 4, 3 and 8, respectively.
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