question_answer 28)

  Variations during mutations of meioticre combinations are (a) random and directionless                                      (b) random and directional (c) random and small                                                      (d) random, small and directional

Answer:

                  (a) Variations during mutations of meioticre combinations are random and directionless. Hugo de Vries based on his work on evening primrose stated that it is mutation which causes sudden appearance of variations that results in speciation. He stated that mutations are sudden, heritable and persistant in successive generation. He contradicted Darwinian variations that are small and directional.