question_answer 20)

  If the diploid number of a flowering plant is 36. What would be the chromosome number in its endosperm? (a) 36                                     (b)18                     (c)54                                      (d) 72

Answer:

                  (c) Endosperm is a product of triple fusion. One male nuclei (n=18) fuses with diploid secondary nucleus (2n=36), so it becomes triploid structure (3n= 54). So: ploidy of endosperm is (3n) and chromosomes will be 54.