Chemical damage to DNA can occasionally occur just before DNA replication begins. If the repair system does not have enough time to correct the error before the DNA is duplicated, this can give rise to mutations. In the sequence TGATT, if the adenosine is depurinated and not repaired, which of the following is the point mutation you would observe after this sequence of DNA has gone through two rounds of replication?
a. TGATT
b. TGTTT
c. TGGTT
d. TGTT
e. TATT
Answers: 2
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