Environment and Phenotype is a Grade 7 Science resource focused on how phenotype can result from interactions between genetic makeup and environmental conditions. Students examine how nutrition can influence stature, how ultraviolet exposure can affect melanin production and skin pigmentation, and how temperature-sensitive pigment expression in Himalayan rabbits provides evidence that environmental conditions can influence genetically controlled traits.

What Students Explore

The lesson develops the distinction between inherited genetic contributions and environmental influences on phenotype. Students work with key terms including phenotype, genetic makeup, environment, stature, melanin, and pigment expression while using evidence from real biological examples to explain why traits can vary among organisms.

The resource includes a reading passage followed by multiple-choice questions, true/false statements, short-answer questions, a labeled diagram activity, and a categorizing task. The diagram focuses on temperature and rabbit pigment, while the categorizing activity asks students to distinguish genetic contributions from environmental influences.

Built for Classroom Practice

Use this Grade 7 heredity and variation worksheet as science class practice, a lesson review, independent work, or reinforcement after instruction on traits and environmental effects. The reading passage establishes the core concepts before students apply them through questions and evidence-based responses.

Short-answer prompts ask students to explain how nutrition and genetic differences can both contribute to height, how ultraviolet exposure influences phenotype, and what Himalayan rabbits demonstrate about genes and environment. These tasks give students opportunities to connect specific observations with broader ideas about trait variation.

Included for Teachers

• Student worksheet with a focused reading passage and varied science practice
• Student Notes lines at the bottom of the worksheet
• Answer Key PDF with a Teacher Guide
• Teacher Guide includes Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes

The teacher guidance supports instruction around the central idea that environmental influence does not mean an organism changes its inherited genetic information. It also highlights common misconceptions, such as treating nutrition as the only cause of differences in stature or assuming phenotype is determined entirely by genes or entirely by the environment.

Topics covered: phenotype, genetic makeup, environmental influence on traits, nutrition and stature, ultraviolet exposure, melanin production, temperature-sensitive pigment expression, Himalayan rabbits, inherited characteristics, and variation in traits.