Microtubules in Mitosis. Microtubules play a role in the migration of chromosomes to opposite ends of a mitosing cell during the anaphase.
Since ALD is an x-linked recessive disease, women must have 2 affected x chromosomes in order to get the disease, which is unlikely because the disease is rare. Since men only have one x chromosome, they will have the disease if they inherit an affected x chromosome.
The answer is kinetochore