1 Timothy 2:13 (KJV) For Adam was first formed, then Eve.
God created 2 clear and distinct genders. Adam, a male; Eve, a female.
This God given distinction of only 2 genders was NOT a result of the fall of man. It was how God specially and specifically created BEFORE the fall.
All the fall did was cause rebellious men and women to mess up the 2 gender distinction.
The Bible plainly teaches gender distinction is seen in reproductive parts, roles in the home, the church and in society, and through the outward distinction of dress, hair & behavior.