Imagine a person with genotype XY but their gene for 5-alpha-reductase is mutated such that it does not create any functional 5-alpha-reductase. Which of the following would be true of this person?
1) Normal testis development and regression of Mullerian system but female external genitalia
2) Normal testis development and regression of Mullarian system, failure of Wolffian duct system to develop and female external genitalia
3) No development of testis but normal external genitalia
4) Failure of Wolffian duct system to develop