What is a centriole.

Set of nine triplets of microtubules and many proteins, each set of triplets is referred to as A,B and C. A is central one is complete, and connected to center by radial spokes, whereas B and C are incomplete since they share protofilaments with the surrounding ones, (A and B respectively) 2 make centrosomes. They are sites for nucleation Polymerize MT for spindle (from centriole to the periphery since polymerization occurs in the + end) They are duplicated by the nucleation of two other centrioles by the pericentriolar region of the parent cell.