Chaos in the Y-chromosome evolution?
  The Y-chromosome degeneration is still an intriguing mechanism and comprises the very origin of sex. We present a coupled version of the well known logistic map and the logistic equation describing the evolution of XY chromosomes. Although chaos was found in X, Y chromosomes do not evolve chaotically. A mathematical constraint is shown as the responsible for this behaviour. In addition, analytical solutions are presented for the differential equations herein. 
Matheus P. Lobo, Edison T. Franco, Nilo M. Sotomayor, Felipe R. Costa
nlin.CD physics.bio-ph q-bio.PE