Easy answer would be from a female's ovary.
https://en.wikipedia.org/wiki/Evolution_of_sexual_reproduction#Origin_of_sexual_reproduction
It appears there are quite a few theories about that.
Easy answer would be from a female's ovary.
https://en.wikipedia.org/wiki/Evolution_of_sexual_reproduction#Origin_of_sexual_reproduction
It appears there are quite a few theories about that.
Where did the eggs come from?