Answer:
First round 1/2 will be radio active
Second round 1/4 will be radio active
Third round 1/8 will be radio active
Step-by-step explanation:
Whenever cells divide, they must first synthesis new DNA making it 2n. This doubling of DNA allows for both daughter cells to have the same number of chromosomes after cytokineses. When cells with radioactive DNA is placed in media that contains non-radio active DNA the first of the newly synthesized strands will be 1/2. Every consecutive replication will reduce the radioactive DNA by half. This will result in 1/2, 1/4, 1/8 and if it continues 1/16 and so on.