Download Slide 1 - Jefferson School District

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.