Genetics Practice Test Worksheets Page 33
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3491.
Base your answer(s) to the following
93. Base your answer(s) to the following
question(s) on the information and diagram
question(s) on the table below, which
below and on your knowledge of biology.
represents the DNA codes for several amino
acids.
The diagram below shows the
results of a test that was done using
Amino Acid
DNA Code Sequence
DNA samples from three bears
Cysteine
ACA or ACG
of di erent species. Each DNA
Tryptophan
ACC
sample was cut into fragments using
Valine
CAA or CAC or CAG or CAT
a speci c enzyme and placed in the
Proline
GGA or GGC or GGG or GGT
wells as indicated below. The DNA
Asparagine
TTA or TTG
fragments were then separated using
gel electrophoresis.
Methionine
TAC
The original DNA sequence undergoes the
following change:
TACACACAAACGGGG !
TACACACAAACGGGT
State one reason this mutation produces no
change in the action of the nal molecule
that will be synthesized from this code.
Which two bears are most closely related?
Support your answer with data from the test
results.
92. Identify one additional way to determine the
evolutionary relationship of these bears.
page 33
GENETICS UNIT PRACTICE TEST
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