Mexican Shrimp and Avocado Salad with Tortilla Chips

Name: Mexican Shrimp-and-Avocado Salad with Tortilla Chips
Ingredients: 1 Pound shelled and deveined medium shrimp; 2 Count romaine hearts, coarsely shredded; 2 Cup cherry tomatoes, halved; 1 Count small seedless cucumber, diced; 0.5 Cup coarsely chopped cilantro; 1 Count hass avocado, diced; 4 Ounce tortilla chips; 2 Tablespoon reduced-fat sour cream; 2 Tablespoon reduced-fat mayonnaise; 2 Tablespoon fresh lime juice; 0.5 Teaspoon finely grated lime zest; 0 salt; 0 freshly ground pepper