Karyogamy vs. Syngamy

Karyogamynoun

(biology) The fusion of two nuclei within a cell, especially as the second stage of syngamy.

Syngamynoun

The fusion of two gametes to form a zygote.

Karyogamy

Karyogamy is the final step in the process of fusing together two haploid eukaryotic cells, and refers specifically to the fusion of the two nuclei. Before karyogamy, each haploid cell has one complete copy of the organism's genome.