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1) To the right, is a half of a section of DNA that has been split apart and is ready to copy itself. Write the correct base in the space provided to build the DNA’s new strand. G-------____ T------- ____ A------- ____ A------- ____ C------- ____ T ------- ____ C------- ____ DNA & Mutations 4) When mutations occur in DNA, they can change the information that DNA carries. To understand, look at the sentence below, which only uses three-letter words. AMY GOT THE RED HOT POT OFF THE LOG If one letter is deleted from this sentence it becomes: 2) Below are two sequences – an original and a sequence after TWO mutations. Circle the mutations, and C G C G describe what occurred. T A T A C G C G A T A T C G C C T A T A A T A G G C G C Original DNA G A G T G A T C Original DNA Describe what happened to make this mutation. 5) Write your own sentence with only three-letter words. Mutated DNA 3) When making proteins DNA is copied using uracil (U) instead of thymine (T). C T C A C T A G AMY GTT HER EDH OTP OTO FFT HEL OG C T C A C T A G G A G U G A U C DNA for protein Now: Make just one change to your sentence. Circle the differences between the two strands. Is the change (mutation) in your sentence, harmful, helpful or neither. Explain.