Microtubules are important to cell structure and for helping differentiate between dendrites and axons in neurons. The polarity of microtubules is oriented with the axon being plus end out and the dendrite being minus end out. We know several mechanisms that contribute to microtubule polarity in Class 1 drosophila neurons, however we are concerned with examining checkpoint systems at the cell body exit points and mechanisms controlling microtubule polarity after they are nucleated.