Significance of Mitosis(i) It keeps the chromosome number constant and genetic stability in daughter cells, so the linear heredity of an organism is maintained. All the cells are with similar genetic constituents.(ii) It helps in growth and development of zygote into adult through embryo formation.(iii) It provides new cells for repair and regeneration of lost parts and healing of the wounds.(iv) It helps in asexual reproduction by fragmentation, budding, stem cutting, etc.(v) It also restores the nucleo-plasmic ratio.(vi) Somatic variations when maintained by vegetative propagation can play important role in speciation.Significance of meiosis:(i) From diploid cells haploid gametes are produced by this process.(ii) It restricts the multiplication of chromosome numbers in every generation.(iii) It results in variation among the offspring due to crossing over.