Microtubules, a structure of the cytoskeleton, are responsible for assuring that the two members of a homologous chromosome pair go to different daughter cells. During Anaphase I, the pair of homologous chromosome move to opposite sides of the cell, through a process called segregation. Microtubules emerging from a structure on the cell surface, called spindle, bind to each chromosome of the pair and ensure the separation of the pair.