The idea that eukaryotic chromosomes replicate semiconservatively was supported by Taylor et al,in experiments using ³H-thymidine labeled DNA from ______:
A) E. coli , and saw that the DNA was of intermediate density after one round of replication
B) Vicia faba, and saw that only one of the chromatids of each pair was radioactive after a second round of c-metaphase.
C) Vicia faba , and saw that only one of the chromatids of each pair was radioactive after a single round of c-metaphase.
D) E. coli , and saw that the DNA was of light density after one round of replication
E) None of these

Question

Quizplus · Accepted Answer

Taylor et al.'s experiments involved using ³H-thymidine to label the DNA of Vicia faba (a type of broad bean). They observed that after a second round of replication (c-metaphase), only one of the chromatids in each chromosome pair was radioactive, supporting the idea of semiconservative replication in eukaryotic chromosomes. This means that each new DNA molecule consists of one original strand and one new strand.

The Idea That Eukaryotic Chromosomes Replicate Semiconservatively Was Supported by Taylor