Lactose intolerance is common, but is actually a recessive genetic trait! Humans and other mammals are only meant to drink milk as infants and as they grow, they lose the ability to digest lactose. As populations began to develop, the domestication of cows and drinking milk into adulthood became more common, leading to a tolerance for lactose. Learn about variation, inheritance, and the role of DNA and proteins in expression of traits in this three-part laboratory activity! This kit contains enough materials for 15 groups, a Teacher's Manual, and a Student Study Guide copymaster. ?Aligned to the Next Generation Science Standards (NGSS)* Disciplinary Core Ideas: LS1.A; LS3.B Performance Expectations: HS-LS1-1; HS-LS3-3 Cross Cutting Concepts: Structure and Function; Systems and System Models Engineering Practices: Constructing Explanations and Designing Solutions; Analyzing and Interpreting Data; Using Mathematics and Computational Thinking Kit Contents: Lactase Powder, 3 g Milk Powder, 50 g 15 Glucose Test Strips 15 Glucose Color Charts 30 Mixing Cups Measuring Cup 15 Stirring Rods Lactase Scoop 30 Multicolored Chips DOT Info: Not regulated. *"Next Generation Science Standards" is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards was involved in the production of, and does not endorse, this product.