DNA Analysis (Awareness Level)

DNA is the code inside almost every cell that carries instructions for how a body is built and runs. You do not need chemistry to understand the main idea.

• DNA is made of four letters arranged in a very long order. Genes are sections that carry instructions.
• You inherit about half your DNA from each parent, with small changes.
• Most traits depend on many genes and on life, such as food, health and environment.
• A test reads some parts of DNA, never the whole story of a person.

Activity. Draw a one-page picture: DNA to genes to traits to environment, with plain labels.

Standard to meet. Draw an accurate picture and check that a non-expert can explain it back.

"A DNA test" can mean very different things, with different uses and limits.

• Ancestry tests estimate where your ancestors may have lived, using comparison groups.
• Health-risk tests report chances of some conditions; carrier tests show if you could pass a condition on.
• Paternity and relationship tests compare DNA between people; forensic tests compare crime-scene samples.
• Medical diagnosis belongs with a clinician and an accredited lab.

Activity. Build a table of five test kinds with purpose, what it cannot tell you, and who should explain results.

Standard to meet. State a limit in each row and name the right person to explain.

Mistakes can enter at every step. Quality systems exist to catch them.

• Steps: consent, collect, label, store, extract, read, check, report.
• Chain of custody records who held the sample and when.
• Errors: mislabelling, contamination, poor storage, misreading.
• Good labs use barcodes, two-person checks and repeat tests.

Activity. Map the sample steps and write one quality check for each step.

Standard to meet. Give every step a check and an owner.

Numbers like "twice the risk" sound alarming but need context.

• Relative risk compares groups; absolute risk is the real chance for a person.
• Gene changes whose meaning is unclear are common and are not proof of disease.
• Results can be wrong or incomplete; confirm important findings in an accredited lab.
• Only a genetic counsellor or clinician explains health results.

Activity. Explain a sample result (given by your mentor) to a peer in under two minutes using absolute numbers.

Standard to meet. Check that the peer repeats the meaning correctly and does not panic.

Some adverts promise a perfect diet, talent or career from your DNA. Most go beyond evidence.

• Look for independent studies, regulator approval and clear limits.
• Be wary of "personalised diet" or "talent" claims and of high prices.
• Check whether samples are analysed in an accredited lab.
• Read the privacy terms before sending a sample.

Activity. Review two real adverts with a five-point checklist.

Standard to meet. Score a list for each advert, with reasons.

Your DNA also describes your relatives. Sharing it can affect them.

• Data may be sold, hacked, or requested by authorities or insurers in some places.
• Findings can reveal unexpected relatives or risks for the family.
• Consent must be informed and free, with the right to withdraw.
• Never test a child or another adult without proper consent and guidance.

Activity. Write a consent checklist with at least eight questions.

Standard to meet. Write each question clearly so that it can be answered yes or no.

Genetic science can help or harm depending on how it is used.

• No test should be forced on employees, students or insurance applicants.
• Some groups have less data in reference sets, so results can be less accurate for them.
• Respect cultural and faith views.
• Ask who benefits, who pays and who is left out.

Activity. Discuss two cases with peers and write a reasoned view on each.

Standard to meet. Reach a view with your peers, with at least two reasons and one risk.

Bring everything into a two-page guide that a curious non-expert can use.

• Use short sentences and a glossary.
• Include the limits, privacy risks and who to ask for help.
• Test with one person aged under 25 and one over 55.
• Date the guide and plan a yearly review.

Activity. Finish and test the explainer.

Standard to meet. Check that both readers can list three limits of DNA tests.

L1: learner can say what DNA is. Focus module: DNA in plain words (Understand, 2 h). DNA is the code inside almost every cell that carries instructions for how a body is built and runs. You do not need chemistry to understand the main idea. Key points: DNA is made of four letters arranged in a very long order. Genes are sections that carry instructions. You inherit about half your DNA from each parent, with small changes. Most traits depend on many genes and on life, such as food, health and environment. A test reads some parts of DNA, never the whole story of a person.

Speaker notes. Teach: open with the worked example. Height is influenced by hundreds of genes and also by food and health in childhood. Two brothers with the same parents can differ by several centimetres. Then set the activity: Draw a one-page picture: DNA to genes to traits to environment, with plain labels. Mark against the standard: Draw an accurate picture and check that a non-expert can explain it back. Check at this level: What is DNA? Model answer: The instruction code in cells.

L2: learner can name the test kinds. Focus module: Kinds of DNA tests (Understand, 2 h). "A DNA test" can mean very different things, with different uses and limits. Key points: Ancestry tests estimate where your ancestors may have lived, using comparison groups. Health-risk tests report chances of some conditions; carrier tests show if you could pass a condition on. Paternity and relationship tests compare DNA between people; forensic tests compare crime-scene samples. Medical diagnosis belongs with a clinician and an accredited lab.

Speaker notes. Teach: open with the worked example. A carrier test reports that a couple each carry a change linked to a blood condition. This does not mean any child will be affected; it means that, for a typical recessive condition, the chance is about one in four per pregnancy, and a genetic counsellor explains the options. Then set the activity: Build a table of five test kinds with purpose, what it cannot tell you, and who should explain results. Mark against the standard: State a limit in each row and name the right person to explain. Check at this level: Is a result destiny? Model answer: No; it is a chance.

L3: learner can read a simple report with limits. Focus module: From sample to result (Analyse, 2 h). Mistakes can enter at every step. Quality systems exist to catch them. Key points: Steps: consent, collect, label, store, extract, read, check, report. Chain of custody records who held the sample and when. Errors: mislabelling, contamination, poor storage, misreading. Good labs use barcodes, two-person checks and repeat tests.

Speaker notes. Teach: open with the worked example. Two tubes are swapped at the front desk. A barcode scan at the lab finds a mismatch with the form and stops the run, avoiding a wrong report. Then set the activity: Map the sample steps and write one quality check for each step. Mark against the standard: Every step has a check and an owner. Check at this level: Why chain of custody? Model answer: To show who held the sample.

L4: learner can check a sample chain. Focus module: Reading a result safely (Analyse, 2 h). Numbers like "twice the risk" sound alarming but need context. Key points: Relative risk compares groups; absolute risk is the real chance for a person. Variants of uncertain meaning are common and are not proof of disease. Results can be wrong or incomplete; confirm important findings in an accredited lab. Only a genetic counsellor or clinician explains health results.

Speaker notes. Teach: open with the worked example. A report says a 50% higher chance of a condition. The absolute chance changes from 2 in 100 to 3 in 100. A counsellor explains that lifestyle and screening matter more than fear. Then set the activity: Explain a sample result (given by your mentor) to a peer in under two minutes using absolute numbers. Mark against the standard: Check that the peer repeats the meaning correctly and does not panic. Check at this level: Who explains health results? Model answer: A genetic counsellor or clinician.

L5: learner can review ads and consent. Focus module: Marketing and overclaims (Evaluate, 2 h). Some adverts promise a perfect diet, talent or career from your DNA. Most go beyond evidence. Key points: Look for independent studies, regulator approval and clear limits. Be wary of "personalised diet" or "talent" claims and of high prices. Check whether samples are analysed in an accredited lab. Read the privacy terms before sending a sample.

Speaker notes. Teach: open with the worked example. An advert promises a diet plan from a saliva test with no study cited. The learner marks it "unproven" and notes the missing evidence. Then set the activity: Review two real adverts with a five-point checklist. Mark against the standard: Score a list for each advert, with reasons. Check at this level: Name one marketing red flag. Model answer: A big promise with no evidence.

L6: learner can coordinate consent records. Focus module: Ethics, fairness and access (Evaluate, 2 h). Genetic science can help or harm depending on how it is used. Key points: No test should be forced on employees, students or insurance applicants. Some groups have less data in reference sets, so results can be less accurate for them. Respect cultural and faith views. Ask who benefits, who pays and who is left out.

Speaker notes. Teach: open with the worked example. A research project adds samples from under-represented communities with community agreement, improving accuracy for them. Then set the activity: Discuss two cases with peers and write a reasoned view on each. Mark against the standard: Reach a view with your peers, with at least two reasons and one risk. Check at this level: Can employers force tests? Model answer: They should not.

L7: learner can audit an explainer. Focus module: Write a plain-language explainer (Create, 2 h). Bring everything into a two-page guide that a curious non-expert can use. Key points: Use short sentences and a glossary. Include the limits, privacy risks and who to ask for help. Test with one person aged under 25 and one over 55. Date the guide and plan a yearly review.

Speaker notes. Teach: open with the worked example. A reader says, "Now I know to ask a counsellor, not a website, about my result." Then set the activity: Finish and test the explainer. Mark against the standard: Check that both readers can list three limits of DNA tests. Check at this level: How often should the explainer be reviewed? Model answer: Yearly.