A mutant strain of yeast possesses a mutation in the nda2 gene,resulting in no production of α1 tubulin.As a result,these cells would most likely
A)not duplicate their chromosomes.
B)not enter M phase.
C)not enter S phase.
D)keep the nuclear membrane intact.
E)have little or no spindle formation.

Question

Quizplus · Accepted Answer

The α1 tubulin is a crucial component of the microtubules that form the spindle fibers required for proper chromosome segregation during M phase. A mutation in the nda2 gene resulting in no production of α1 tubulin would lead to little or no spindle formation. This would make proper chromosome segregation and cell division difficult, if not impossible. Therefore, option E is the correct answer.

A Mutant Strain of Yeast Possesses a Mutation in the Nda2