Question

Which parts of the resulting sister chromatids will be radioactive?

Answer 1

Centromere   is  the  part  of  sister  chromatids  which   will   be   radio  active.  Centromere  is  responsible  in  joining  the  two  sister  chromosomes.A  pair  of  non  radioactive  homologous   chromosome  replicate   in  presence  of  radioactive DNA precursors,  hence   both  sister   chromatids  of  each  replicated  homologous  chromosome  will incoorparate  radioactive  precursors

Answer 2

Identifying the parts of the resulting sister chromatids that will be radiactive is possible with use of radioactive dye and Xray photography. By using radioactive dye and bonding agents, we can identify particular stretches of DNA that corresponds to certain amino acids sequences.