Replica procedure for probabilistic algorithms as a model of gene   duplication
  In the present paper we propose to describe gene networks in biological systems using probabilistic algorithms. We describe gene duplication in the process of biological evolution using introduction of the replica procedure for probabilistic algorithms. We construct the examples of such a replica procedure for hidden Markov models. We introduce the family of hidden Markov models where the set of hidden states is a finite additive group with a p-adic metric and build the replica procedure for this family of markovian models. 
S.V. Kozyrev, A.Yu. Khrennikov
q-bio.MN