17.2 The mating pathway is triggered by signal transduction MATa MAc ATaac elope a Mating yes yes no sporulation no n口 y已s Pheromone a factor a factor Rece ptor binds a factor b in ds a factor none Figure 17. 1 Mating type controls several activities 消当Figure 17.1 Mating type controls several activities. 17.2 The mating pathway is triggered by signal transduction