To the right, is a half of a section of DNA that has been split apart and is ready to copy itself.  ...
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G-------____ T------- ____ A------- ____ A------- ____ C------- ____ T ------- ____ C------- ____ PowerPoint PPT Presentation


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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.

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G-------____ T------- ____ A------- ____ A------- ____ C------- ____ T ------- ____ C------- ____

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G t a a c t c

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:

    • AMY GTT HER EDH OTP OTO FFT HEL OG

    • Describe what happened to make this mutation.

    • 5)Write your own sentence with only three-letter words.

    • Now: Make just one change to your sentence.

    • Is the change (mutation) in your sentence, harmful, helpful or neither. Explain.

2) Below are two sequences – an original and a sequence after TWO mutations.

Circle the mutations, and describe what occurred.

C G

T A

C G

A T

C G

T A

A T

G C

C G

T A

C G

A T

C C

T A

A G

G C

Original DNA

Mutated DNA

3) When making proteins DNA is copied using uracil (U) instead of thymine (T).

C G

T A

C G

A T

C G

T A

A T

G C

C G

T A

C G

A U

C G

T A

A U

G C

Circle the differences between the two strands.

Original DNA

DNA for protein


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