Genes to Traits Mutation Lab

This sequence explores how DNA mutations lead to physical traits and diseases. Students move from understanding basic molecular errors to analyzing complex chromosomal abnormalities and the evolutionary implications of genetic variation.

Categorizing Genetic Mutations

Students differentiate between point mutations (silent, missense, nonsense) and frameshift mutations. They practice editing DNA sequences to observe how the resulting amino acid chain changes.

Case Study Sickle Cell Anemia

Students analyze the specific glutamate-to-valine substitution in hemoglobin. They trace the effect from the DNA mutation to the hydrophobic pocket formation, protein aggregation, and red blood cell distortion.

Frameshift Mutations and Cystic Fibrosis

Students examine the CFTR gene deletion (Delta F508) to understand how a missing codon affects protein processing. They discuss how the protein is trapped in the ER, leading to mucus buildup.

Chromosomal Abnormalities and Karyotyping

Moving beyond single genes, students look at large-scale chromosomal changes (deletions, translocations, nondisjunction). They practice analyzing karyotypes to identify disorders like Down Syndrome or Turner Syndrome.

Mutation Impact and Evolution

Students debate whether mutations are beneficial, harmful, or neutral depending on the environment. They analyze data on heterozygote advantage (e.g., malaria resistance) to connect genetics to population trends.