- It in dudes the events after the formation of zygote.
Zygote : - Every sexually reproducing organism begins life as a zygote.
- It is the vital link between organism of one generation and the next.
- The development of zygote depends on the type of life cycle of the organism and the nature of environment.
- In fungi and algae,zygote develops a thick wall which is resistant to desiccation and damage.It undergoes a period of rest before germination.
- In organism with haplontic life cycle,zygote divides by meiosis into haploid spores that grow into haploid individuals.
Embryo genesis : - It is the process of the development of embryo from the zygote.
- The zygote undergoes cell division and cell differentiation.
- the cell division increase the number of cells in the embryo.
- Cell differentiation causes the modifications of groups of cells into various tissues and organs to form an organism.