Bring a large saucepan of water to a boil over high heat. Add corn, and reduce heat to medium; simmer
until kernels are tender, 5 to 10 minutes. Transfer corn to a plate; let cool. Slice kernels off cobs; place in a small bowl, and set aside (you should have about 1 1/4 cups).
Preheat oven to 350 degrees. Spread tortilla wedges in a single layer on a rimmed baking sheet; bake
until crisp, turning once, about 10 minutes. Remove from oven; let cool, and set aside.
Make the dressing: In a medium bowl, whisk together yogurt, juice from 1 lime, cilantro, jalapeno, and salt. Set aside.
In a medium nonstick skillet, brown turkey over medium heat, stirring frequently, until no longer pink, about 7 minutes. Stir in chili powder, cumin, and juice from remaining lime.
Transfer mixture to a large serving bowl. Add lettuce, beans, tomatoes, onion, mango, and reserved corn and tortillas. Toss to combine well. Drizzle with yogurt dressing; serve immediately.