During cleavage in fertilized egg, which centriole of sperm is responsible for formation of astral rays?
Answers
During cleavage in fertilized egg, the centrioles consists of astral microtubules which are generated in the cylindrical microtubules which are referred as the centrioles in a cell nucleus. Centrioles are found in with inside that of the centrosome which is an organelle which is located near the cell nucleus that forms the spindle poles of the cells. Astral ray basically made up of microtubules which radiates from the centrosphere and look like a cloud found in the cell.
During the cleavage in a fertilized egg, the proximal centriole of the sperm is responsible for the formation of aster rays.
After the incorporation of sperm into the oocyte, sperm aster forms from the proximal centriole which allows for the pronuclear apposition.
The proximal centriole also maintains a close link with decondensing sperm nucleus which gradually grows into male pronucleus.