english: Since our own sex is determined by genes, and we do know of these other animals that have their sex determined by genes, it's easy to assume that for all animals the sex of their babies still must be determined by genetics.
non_english: Pošto je naš pol genetski određen, a znamo i da se kod drugih životinja pol određuje genetski, lako je zaključiti da za sve životinje važi da je pol bebe određen genetski.