Genetics Practice Test Worksheets Page 8

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23. Base your answer to the following question
24. Several gold sh were kept in a small
on the graph below and on your knowledge
aquarium for several years. The sh grew to
of biology. The graph shows the level of
be approximately 6 centimeters long in the
gene expression of ve di erent genes in
rst year, and after that, growth in length
normal and cancerous cells.
stopped. These sh were later transferred
to a large pond. In the pond, the gold sh
grew much larger, reaching lengths of around
25 centimeters. Which statement provides
the best explanation for the increased growth
of the sh in the pond?
(1) Chemicals present in the pond increased
the amount of DNA in the sh, causing
the growth increase.
(2) The expression of genetic information
Which statement is a valid inference that can
in the
sh was in uenced by their
be made based on the data in this graph?
surroundings.
(3) The sh expressed and passed on only
(1) The change in the level of gene
those characteristics that enabled them
expression in gene 4 could indicate it
to survive in the new environment.
plays a major role in the development
of cancer.
(4) The size of the sh depended only on
their food supply and not on their DNA.
(2) Slight decreases in gene expression will
always result in the formation of cancer
cells.
(3) Cells will develop cancer if the gene
expression of these ve genes remains
below four peptides per second.
(4) An increase in the level of gene
expression in these
ve genes is
necessary for cancer to develop in cells.
page 8
GENETICS UNIT PRACTICE TEST

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