In the yeast signal transduction pathway, after both types of mating cells have released the mating factors and the factors have bound to specific receptors on the correct cells, in the yeast signal transduction pathway, after both types of mating cells have released the mating factors and the factors have bound to specific receptors on the correct cells, binding induces changes in the cells that lead to cell fusion. the cell membranes fall apart, releasing the mating factors that lead to new yeast cells. the cells then produce the a factor and the α factor. one cell nucleus binds the mating factors and produces a new nucleus in the opposite cell. a growth factor is secreted that stimulates mitosis in both cell