What happens after the pollen tube enters one of the synergids?

Step-by-step solution

After entering one of the synergids, the pollen tube releases the two male gametes into the cytoplasm of the synergid . One of the male gametes moves towards the egg cell and fuses with its nucleus thus completing the syngamy. This results in the formation of a diploid cell, the zygote. The other male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid primary endosperm nucleus (PEN). As this involves the fusion of three haploid nuclei it is termed triple