def chromosomeCrossover(self):
        pair1 = [self.chromosomeChoosing(), self.chromosomeChoosing()]
        pair2 = [self.chromosomeChoosing(), self.chromosomeChoosing()]

        crossoverRate = 0.7
        crossover = random.uniform(0, 1)

        offspring1 = []
        offspring2 = []
        offspring3 = []
        offspring4 = []
        offspring5 = []
        c = Chromosome(self.mazeX, self.mazeY)

        i = 0
        if crossover <= crossoverRate:
            x = c.moves // 2
            i = 0

            while i < x:
                offspring1.append(pair1[0][i])
                offspring2.append(pair1[1][i])
                i += 1

            i = c.moves // 2

            while i < c.moves:
                offspring1.append(pair1[1][i])
                offspring2.append(pair1[0][i])
                i += 1
        else:
            while i < c.moves:
                offspring1.append(pair1[0][i])
                offspring2.append(pair1[1][i])
                i += 1

        crossover = random.uniform(0, 1)

        i = 0
        if crossover <= crossoverRate:
            x = c.moves // 2
            i = 0

            while i < x:
                offspring3.append(pair2[0][i])
                offspring4.append(pair2[1][i])
                offspring5.append(pair1[0][i])
                i += 1

            i = c.moves // 2

            while i < c.moves:
                offspring3.append(pair2[1][i])
                offspring4.append(pair2[0][i])
                offspring5.append(pair2[1][i])
                i += 1
        else:
            while i < c.moves:
                offspring3.append(pair2[0][i])
                offspring4.append(pair2[1][i])
                offspring5.append(pair2[0][i])
                i += 1

        self.population.clear()



        c1 = GenerationalChromosome(offspring1, self.mazeX, self.mazeY)
        c2 = GenerationalChromosome(offspring2, self.mazeX, self.mazeY)
        c3 = GenerationalChromosome(offspring3, self.mazeX, self.mazeY)
        c4 = GenerationalChromosome(offspring4, self.mazeX, self.mazeY)
        c5 = GenerationalChromosome(offspring5, self.mazeX, self.mazeY)

        self.population.append(c1)
        self.population.append(c2)
        self.population.append(c3)
        self.population.append(c4)
        self.population.append(c5)

        self.chromosomeMutation()