What was the commission Christ gave the apostles?  According to both Matthew and Mark, they were to go forth to teach, preach the gospel, and baptize.  In other words, they were to be missionaries.

Despite the fact that only men were given this commission, women are serving in the missions where they preach the gospel.  They teach in our schools, universities and even our seminaries.  And, while women are not the usual ministers of Baptism, they can and do baptize.

If it is true that women can't be ordained because the apostles were all men, then it also must be true that women can't teach, preach, and baptize, since that commission was given only to men.  If women may do these things, then women also may be ordained.  Simply stated, the Church can't pick and choose when to follow Christ's example.  His example is either binding in all cases, or it is not binding.