DNA modeling cer

Question

J.P. says the two sections (pieces of DNA) that would be made from step 7 would be identical. Michelle says they would be different.

 

Make a claim for whom you agree with and provide evidence from this investigation that supports your reasoning. (3pts)

Answer 1

Fast note…. I think you are making the interesting argument of competing paradigms that basically describe the Meselson/Stahl models of semi-conservative replication:

(1) Semi-conservative replication model. Each strand of DNA is a template for the synthesis of a new, complementary strand. The result is two DNAs with one original strand and one new.

(2) Dispersive replication model. Two DNAs are hybrids from parental and sibling DNA where each strand consists of an original and a new DNA.

(3) Conservative replication model. One DNA consists of both original DNAs and another that consists of two DNAs of the same sequences as the original.

-jq