(i) X-Mitosis. Y-Meiosis
(ii) (a) In X, there is no association of homologous chromosomes but in Y, homologous
chromosomes pair up together to form bivalents during prophase-I.
(b) In X, there is no crossing over as there is no formation of chiasmata but in Y, crossing over occurs at the chiasmata whereby some genes are swapped between homologous chromosomes.