What is the biblical justification for permitting female pastors? It seems that that 1Timothy 2:12-14 (NASB) says that women shouldn't be pastors.  But there are many denominations that allow this.  


  1 Timothy 2:12-14 (NASB)
  12 But I do not allow a woman to teach or exercise authority over a
  man, but to remain quiet. 
  13 For it was Adam who was first created, and then Eve. 
  14 And it was not Adam who was deceived, but the woman being
  deceived, fell into transgression.


This idea also seems supported by the command that women should remain silent in church (1 Corinthians 14:34-35).

What is the biblical basis for allowing women to preach or be a pastor?  Specifically, what is the biblical basis of the doctrine of ordination of women?  Also, how do the followers of this doctrine reconcile their beliefs with that of 1 Timothy and 1 Corinthians 14:34-35 above?
This is a question on which Christians disagree among themselves. Even those who hold the Bible as a sole source of authority reach contradictory conclusions on the matter.

On the side of not permitting women pastors, the main passage is 1 Timothy 2:12-14:


  But I do not allow a woman to teach or exercise authority over a man, but remain quiet. For it was Adam who was first created, and then Eve. And it was not Adam who was deceived, but the woman being quite deceived, fell into transgression.


On the side of those who permit women pastors is Galations 3:28:


  There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.


There are others of course. Each side has good arguments why their favorite verses are definitive, and the others are a matter of context.

In short this is a highly complicated issue, which cannot be resolved in a single answer. I strongly recommend further reading on both sides:


NT Wright
Who said Women Can't Teach?
Discovering Biblical Equality: Complementarity Without Hierarchy