This document describes a real-coded extended compact genetic algorithm (RECGA) based on mixtures of models. RECGA uses probabilistic models like Bayesian optimization algorithms but with simpler models than typically used in BOAs. It applies an estimation of distribution algorithm approach using probabilistic models to generate new candidate solutions rather than using recombination and mutation operators as in traditional genetic algorithms. The RECGA method is presented as a way to take advantages of both extended compact genetic algorithms and Bayesian optimization algorithms while using less complex probabilistic models.