A morula has approximately 16 cells. what is the rate of mitotic division that takes place between the 4-cell stage and the morula?

The rate of mitotic division that takes place between the 4-cells stage and the morula, is 12 hours per cell division. The first division occurs in about a day after fertilization, and subsequent divisions occur every 12 to 24 hours after that. The zygote divides several times to form a mass of cells called morula, which is an embryonic stage consisting of a solid, compact mass of 16 or more cells.