code: public BitChromosome invert() {
  		final byte[] data = _genes.clone();
  		bit.invert(data);
  		return new BitChromosome(data, _length, 1.0 - _p);
  	}
docs: Invert the ones and zeros of this bit chromosome.
  
  @return a new BitChromosome with inverted ones and zeros.