How did male and female evolve from an asexual organism?

Continuation of my previous question.

—Can experiments reproduce the same results?
—Is it a theory?

I would prefer actual answers, rather than suppositions. Anyone can guess, but this is a site where we reach out to experts.

Thanks!

Disclaimer: I believe in creation, and micro-evolution. I do not believe in macro-evolution. My questions are genuine and I am looking for logical understanding. Rather than focus on my “foolish” belief in creation, just focus on my scientific side looking for answers.