Talk:MUTO/@comment-25322628-20150311194256/@comment-25285745-20150327194121

The only official female kaiju in the Godzilla series are Mothra, the female Rodan from the 1956 film, Biollante, Megaguirus, and the female M.U.T.O. All other monsters are pretty much considered officially male. Some of them are probably truly genderless. Destoroyah and Hedorah would be genderless, since they are composite creatures of trillions of smaller organisms and can reproduce asexually by dividing. Orga is probably also genderless, since he is composed of several Millennian aliens sharing one body. Of course, on top of that he possesses the DNA of a male kaiju, Godzilla, perhaps the reason he is officially male.

Mothra Leo is officially male from what I can tell. The English dubs switch his gender from film to film, but everything else seems to be consistent with him being male. He has a sister in Godzilla Island, which really doesn't make any sense. Mothra reproduces asexually in the first place, meaning her offspring should be clones of her (But of course, Mothra reproduces through divine methods, not biological ones. Rebirth of Mothra establishes that she does not lay her eggs, but summons them). Mothra's larvae hatch from the same egg, meaning they should be identical twins. Yet in Godzilla Island and in Tokyo S.O.S., one larva is said to be male and the other is female. So, I guess the logic is that since Mothra is divine, her reproduction doesn't need to make sense.

Zilla is officially male, but reproduces asexually. Japanese Wikipedia says that his cells are male, but spontaneously changed to allow for the production of egg cells, which is what Dean Devlin and Toho supposedly maintain as well. The easiest way to describe him is a hermaphrodite, but one that started out as male. The Heisei Gyaos have only two chromosomes, and when born probably possess the genetic information equivalent to X chromosomes on both of them, making them female. However, Gyaos can alter its own chromosomes to reproduce asexually, essentially meaning that the genetic information equivalent to the Y chromosome develops on one of their chromosomes.