When some animals reproduce asexually, they fully clone themselves - for example, whiptail lizards (AKA the lesbian lizards who we told you about in this linked thread) 

Komodo dragons do it a little differently. When they reproduce asexually, they use a process called half-cloning, where a small cell called a polar body, which is produced at the same time as ovulation, fuses with the egg cell. Basically, komodo dragons are fertilising their own eggs. https://masto.ai/@vagina_museum/109563465595162536

You probably learned at school that sex is determined by XX chromosomes to make a female, and XY chromosomes to make a male, but that isn't *quite* true.

Some animals use altogether different systems. The komodo dragon is one species who instead has a ZW system of sex determination (along with birds, some fish, some crustaceans, many reptiles and some insects).

(Also it's more complicated than that in animals that do have the XY system).