The macronucleus of ciliates for example contains hundreds of acentric chromosomes. Examples of smaller players include Skuuber and Acentric Express Test. This is the reason why the quadratic electrogyration exists only in the acentric crystals. A second strombolian cone appeared then, the new Pariou one, slightly acentric to the south. Chromosome-breaking events can also generate acentric chromosomes or acentric fragments. Acentric chromosome fragments may arise in a variety of ways. Such acentric fragments are unequally distributed between the daughter cells after cell division. An acentric fragment is a segment of a chromosome that lacks a centromere. As a result, one of the daughters will lack the acentric fragment. Acentric fragments are commonly generated by chromosome-breaking events, such as irradiation. If a chromosome lacks a centromere, it is said acentric. The acentric factor is said to be a measure of the non-sphericity (centricity) of molecules.