  According to this critique, the gory details objection also fails. This objection claims that biologists cannot improve upon the classical explanations of transmission phenomena by citing molecular details. The cytological level allegedly provides the best level of explanation because explanations at this level uniformly account for a wide range of cases that would look heterogeneous from a molecular perspective. Consider Kitcher's formulation of this objection. Kitcher believes that to explain is to unify (1989). It follows that the best explanation of a class of phenomena is the explanation that accounts for the class in a uniform way. Kitcher claims meiosis exemplifies this kind of situation. The uniformity of pair-separation processes is evident at the cytological level, but is lost in the gory details at the molecular level where the process “may occur because of the action of electromagnetic forces or even of nuclear forces …” (Kitcher 1984, p. 350). But it is unclear what Kitcher could have in mind. The molecular mechanisms underlying the pairing and separation of chromosomes are remarkably uniform in creatures ranging from yeast to human beings; it is not the case that some involve electromagnetic forces and others involve nuclear forces.  Kitcher's claim that “it is easy to think of examples in which the separation is effected by the action of gravity” has no basis in what molecular biologists have learned about the pairing and separation of chromosomes.