Combine cake mix, yogurt and eggs. Mix just until moistened. Spoon batter into lightly greased muffin cups or in bake cup-lined muffin cups, filling each half full. Spoon 1/2 teaspoon preserves into the center of each cupcake. Sprinkle 1/2 teaspoon wheat germ over each cupcake. Bake for 25 minutes.