Check Your Knowledge
GRAPHIC CONTENT
Thinking critically about visual displays of data.
1. What proportion of corn
grown in the United States
is genetically modified?
GENETICALLY MODIFIED CROPS
IN THE UNITED STATES
14%
5. Worldwide, the percent of corn grown
that is genetically modified is just
26%, while the proportion of
soybeans that is genetically modified
is 77% and cotton is 49%. How would
this information add value to the
figure?
86%
2. From the figure, can you
determine whether there is
more genetically modified
corn or genetically modified
cotton produced in the
United States? How do you
do this? And if it is not
possible, why isn’t it?
6. The proportion of corn grown in
Corn
7%
the United States that is genetically
modified has changed since 2001 as
follows:
93%
3. What is the “take-home
message” from this
figure? Does it influence
your thoughts on
genetically modified
crops? Why or why not?
Cotton
7%
93%
4. Why are data given for
proportions of genetically
modified crops rather than
absolute amounts? Does this
alter your interpretation of
the graph?
Soybeans
Proportion of crops that are not genetically modified
Proportion of crops that are genetically modified
Year
Proportion
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
26%
34%
40%
47%
52%
61%
73%
80%
85%
86% (shown in the graph)
Show two different ways that you
could display these data. What is
the clearest conclusion someone
would draw from the figures?
See Answers at the back of the book.
Key Terms in DNA, Gene Expression, and Biotechnology
allele, p. 176
base, p. 172
base pair, p. 173
biotechnology, p. 194
chromosomal aberration,
p. 190
chromosome, p. 175
clone, p. 196
clone library, p. 197
cloning, p. 196
code, p. 175
216 codon, p. 183
deoxyribonucleic acid
(DNA), p. 172
DNA probe, p. 198
gene, p. 175
gene expression,
p. 185
gene library, p. 197
gene regulation,
p. 185
gene therapy, p. 208
genetic engineering,
pp. 194, 198
genome, p. 175
genotype, p. 178
intron, p. 177
messenger RNA (mRNA),
p. 179
mutation, p. 189
nucleic acid, p. 172
nucleotide, p. 172
operon, p. 187
C h a p t e r 5 • D N A , G e n e E x p r e s s i o n , and B i o t e chn o l o g y
phenotype, p. 179
plasmid, p. 196
point mutation, p. 190
polymerase chain reaction
(PCR), p. 195
promoter site, p. 180
protein synthesis, p. 185
recombinant DNA
technology, p. 198
restriction enzymes,
p. 195
ribosomal subunits, p. 182
short tandem repeats
(STRs), p. 212
stem cell, p. 208
trait, p. 176
transcription, p. 179
transfer RNA (tRNA),
p. 182
transgenic organism,
p. 196
translation, p. 179