After fertilisation, the ________ divides repeatedly to give rise to a ball of cells.
zygote
Fusion of the male and the female gamete, i.e., the sperm and the ovum, is called fertilisation. This results in the formation of a single-celled zygote. After fertilisation, the zygote divides repeatedly to give rise to a ball of cells. This ball of cells eventually develops into the various types of cells and tissues in an organism.