AS 91159 · 4 credits · External
Gene expression
Demonstrate understanding of gene expression
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This standard is about understanding how genes are expressed — how the instructions in your DNA actually get turned into proteins and how those proteins affect what you look like and how your body works. You need to understand the key steps from DNA to protein, explain how genes control body functions through proteins, and describe how both genes and environment work together to create your traits.
What to do, grades and common mistakes
- ·Define key concepts like nucleotides, codons, protein synthesis, transcription, and translation using accurate biological language
- ·Use annotated diagrams or models to explain how DNA sequences lead to protein production and how proteins determine your characteristics
- ·Explain how genes code for enzymes that control metabolic pathways, and how the presence, absence, or amount of these proteins affects your traits
- ·Describe how environmental factors (like mutagens or temperature) can change gene expression and phenotype without changing the actual DNA sequence
You can define key terms, identify the steps of protein synthesis from DNA to protein, and describe what gene expression means using correct biological language.
You explain the detailed mechanisms — how DNA sequence determines protein structure, how enzymes control metabolic pathways, how the amount of proteins produced affects phenotype, and how environment influences expression without changing genes.