Answer:
All the chromosomes in the nucleus
Step-by-step explanation:
The centrioles and the chromosomes are two components of a cell that replicate themselves prior to the onset of mitosis.
Cylindrical centrioles are found close to the cell's nucleus. By arranging the microtubules that pull the chromosomes apart during mitosis, they play a critical purpose in cell division. Centrioles multiply to produce two sets before the start of mitosis, which is necessary for the appropriate segregation of chromosomes during cell division.
The lengthy, thread-like structures known as chromosomes transport genetic data. Chromosomes multiply to create sister chromatids, which are kept together by a centromere, before mitosis starts. Each new cell will acquire a full set of chromosomes thanks to this procedure, known as DNA replication.