Q.The union between a very small motile male gamete and a large non-motile female gamete is called

Biologists recognise several distinct kinds of syngamy based on where the fusing gametes come from and how similar they are. In autogamy, both gametes are produced by the very same cell or organism, and these self-produced gametes fuse to form the zygote (Actinosphaerium, Paramecium). In exogamy, the gametes come from two different parents, making it biparental - the standard example is the human being, a dioecious (unisexual) species where each individual produces only one kind of gamete. In some lower organisms, whole mature individuals behave as gametes without any specialised gamete cells forming at all, and the fusion of two such organisms is called hologamy (Trichonympha). Paedogamy is the sexual union of young individuals produced immediately after an adult parent cell's mitotic division. The remaining types classify syngamy by gamete similarity: merogamy is the fusion of small, morphologically dif …