Here's why:
* DNA contains the genetic code: DNA holds the blueprint for all the proteins a cell needs to function, including those involved in cell division.
* Cell division requires replication: When a cell divides, it needs to create a complete copy of its DNA to pass on to each daughter cell.
* DNA replication is a complex process: DNA replication involves unwinding the DNA double helix, separating the two strands, and using each strand as a template to build a new complementary strand.
So, while other structures like centrioles and spindle fibers play important roles in the mechanics of cell division, it's the DNA that holds the essential information for creating a duplicate cell.
