Overview

Population Genetics & Evolution is a Grade 12 Science TEKS lesson bundle that builds students’ understanding of heredity, genetic change over time, and how modern cell and genomic evidence supports evolutionary explanations. Use these 10 TEKS-aligned worksheets to guide instruction in a focused unit and provide ready-to-grade practice and assessment.

What’s Included

• ✅ Population Genetics Worksheet | Grade 12 Science Practice – Apply core ideas of allele frequencies and population-level genetic change.
• ✅ Phylogenetics Worksheet | Grade 12 Science Activities – Use traits and branching models to interpret evolutionary relationships.
• ✅ Molecular Genetics Worksheet | Grade 12 Science Activities – Connect DNA, genes, and inheritance by analyzing molecular processes.
• ✅ Mendelian Patterns Worksheet | Grade 12 Science Assessments – Predict phenotypes and genotypes using Mendelian reasoning and probability.
• ✅ Genomic Technologies Worksheet | Grade 12 Science Practice – Interpret how genomic tools generate evidence for variation and ancestry.
• ✅ Evolution Mechanisms Worksheet | Grade 12 Science Activities – Examine how natural selection, drift, mutation, and gene flow shape populations.
• ✅ Energy Transformations Worksheet | Grade 12 Science Practice – Evaluate how energy moves through biological systems and processes.
• ✅ Cell Division Worksheet | Grade 12 Science Activities – Compare mitosis and meiosis and analyze their roles in growth and reproduction.
• ✅ Cell Architecture Worksheet | Grade 12 Science Practice TEKS – Analyze structures and functions within cells to explain biological organization.
• ✅ Biodiversity Conservation Worksheet | Grade 12 Science Activities – Apply evolution and genetics ideas to real conservation decisions.

Skills & Standards

This Population Genetics & Evolution TEKS lesson bundle emphasizes evidence-based reasoning across multiple TEKS-aligned themes: students learn to connect structure and function (cell architecture, genetic material, and biological systems) with patterns (Mendelian ratios, inheritance trends, and tree structures). Learners practice modeling and analytical thinking by using probability to support phenotype predictions, interpreting phylogenetic diagrams to infer common ancestry, and evaluating genomic or molecular evidence to justify claims.

Within the unit, students strengthen core disciplinary skills such as: reading data representations (allele frequencies, trait matrices, branching trees), using cause-and-effect explanations for evolutionary mechanisms, and constructing claims supported by scientific evidence. The included worksheets also support laboratory-style interpretation of biological processes (cell division and energy transformations) so that students can connect cellular mechanisms to larger-scale outcomes like variation, adaptation, and biodiversity change.

Perfect For

• Teachers seeking structured instruction
• Sub plans
• Homework or review
• Intervention or centers
• Assessment preparation

How to Use

Plan for about 1–3 weeks of pacing for this single unit, depending on how you integrate class discussions and mini-lessons. Use a brief warm-up tied to the day’s concept (for example, a probability prompt before the Mendelian Patterns worksheet, or a quick “interpret the tree” question before phylogenetics). Follow with guided practice where students annotate the worksheet’s evidence and complete the reasoning steps, then collect exit tickets that require a short written explanation connecting the worksheet to an underlying mechanism (e.g., “Which evolution mechanism best fits the scenario, and why?”). Finish with an end-of-unit review that mixes one item from genetics, one from evolution mechanisms, and one from conservation to check transfer.

Closing

When students work through this Population Genetics & Evolution TEKS lesson bundle, they build the habits of modeling, argument from evidence, and systems thinking needed to explain real biological change.