Question

In case of twins how many gametes get fertilised?

Answer 1

In case of twins one male gamete and one female gamete are fused but in the stage of blastosis (means when it get implant in the uterus) ,it drives into two parts. In case of human being there isn't define in zygote ,which Part of zygote covert into head and other body parts so these are possible in human. But sometimes after the implantation zygote get divided although it is rare case.

Answer 2

in case of twins one male gamete and one female gamete get fused with one another like in normal child... but in twins actually after implantation of the zygote in uterus sometimes it gets divided so twins are formed..
thank u .. hope it is helpful