$\begin{array}{1 1} \text{ Gametogenesis - Syngamy - embryogenesis - zygote} \\ \text{Syngamy - Gametogenesis - zygote - embryogenesis} \\ \text{Gametogenesis - Syngamy - zygote - embryogenesis} \\ \text{Zygote - embryogenesis - syngamy -gametogenesis} \end{array}$
