Science/Strand III/Content Standard 3/High School/Benchmark 2
Benchmark Question: How does genetic material pass from
parent to young during sexual and asexual reproduction?
Focus Question: How does DNA replicate?
With each student
representing a nitrogen base, students will model the replication of DNA.
Example: Give students cards
with the nitrogen bases of DNA (adenine, guanine, cytosine, thymine). Have
one-quarter of the students form a single chain with their bases. Other
students should then match their complementary bases to the first strand to
form one double strand. The teacher acts as the enzyme to unzip the DNA and
form two single strands. The teacher then matches new complementary bases
to the bases in the original two strands. Students should compare the two
new strands to each other and to the original strand. After replicating
DNA, the class will discuss how this replication of DNA relates to cell