public Properties addGenome(String genome){
  if (mGenomes.add(genome)) {
    mGenomeProperties.put(genome,new Properties());
  }
  return mGenomeProperties.get(genome);
}

public Properties addGenome ( String genome ) { if ( mGenomes . add ( genome ) ) { mGenomeProperties . put ( genome , new Properties ( ) ) ; } return mGenomeProperties . get ( genome ) ; }
helper method to add a genome with unspecified sex .
