Genetic testing ethics debate
This page has four parts, in the order you use them. Part 1 is what you need to know. Part 2 says what to do, in plain English. Part 3 shows the work done once on a case that is not yours. Part 4 is your own work and where to turn it in.
Open your materials, follow the steps, then turn in your work.
Students debate whether prospective parents should pursue carrier screening and prenatal genetic testing.
Check you have the right sheet: the top of it prints today's portal day, Genetic testing ethics debate. The PLTW activity itself is in myPLTW and is not posted here.
Optional: listen or watch a unit review▸
Part 1 of 4 · Background and definitions▸
💡 Big idea: Genetic tests reveal permanent, shared family information, so decisions about testing must be governed by consent and privacy rather than by any single person's wishes.
- • status and recessive inheritance patterns determine for offspring.
- • and genetic privacy are core ethical principles in testing decisions.
- • Genetic counselors help families weigh benefits, limitations, and emotional impacts of testing.
Should children reach the age of consent before cochlear implants or other medical interventions are allowed?
Genetic tests reveal permanent, shared family information, so decisions about testing must be governed by consent and privacy rather than by any single person's wishes.
Driving question: A couple just learned that both partners might carry the same recessive disease . Should they get tested before having a child, and who gets to make that call?
New idea: Genetic tests reveal permanent, shared family information, so decisions about testing must be governed by consent and privacy rather than by any single person's wishes.
Visual or model: No figure is attached to this lesson. The readings, the worked example and E1 to E3 carry the evidence.
- Observe or measure the relevant feature in genetic testing ethics debate.
- Organize the observation with a stable evidence ID.
- Apply this rule: Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
- Choose the option the evidence supports and state the limit of the conclusion.
Real biomedical example: A couple just learned that both partners might carry the same recessive disease . Should they get tested before having a child, and who gets to make that call?
What the evidence supports: E1 to E3 support the daily take-home when the response meets the stated success criteria.
What it cannot prove: The package does not support claims beyond this lesson's or any real patient diagnosis.
- • : A photograph of a person's chromosomes arranged in pairs by size, used to spot missing, extra, or rearranged chromosomes.
- • inheritance: The passing of genetic traits from parents to offspring through genes carried on chromosomes during reproduction.
- • : The specific set of gene versions an individual carries, which works with the environment to shape observable traits.
- • phenotype: The observable traits of an organism, such as appearance or function, that result from its combined with environmental influences.
- • : A person who carries one copy of a disease without showing symptoms but can pass it to their children.
- • pedigree: A family tree drawn with standard symbols (squares for males, circles for females, filled for affected) so any geneticist can read a family at a glance.
- • : The increased chance of developing a disease that a person inherits because of specific gene variants passed down in their family.
Use it now: Choose one decision option. Cite E1 and E3, then explain how the rule connects the evidence to your choice. This is thinking practice for the one turn-in named under Turn in, not a second submission.
Go further, optional: The source links below are optional enrichment. Every fact required for today's local evidence decision appears in this lesson package.
A defensible biomedical decision separates scientific evidence from value judgments, identifies who may benefit or be burdened, and states the uncertainty and tradeoffs that remain.
Limit: Scientific evidence can inform the options and likely consequences, but it cannot choose a single value-neutral answer.
Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
Limit: A review-board model organizes reasoning but does not make one ethical principle automatically outweigh every other principle.
Stake out a clear position supported by at least two evidence points.
Limit: E3 defines the classroom product or success criterion. It is not independent scientific evidence and cannot justify a clinical or causal claim.
Today's decision · Simulated classroom evidence scenario
Your role: biomedical investigator
Decision: Your team must decide what the evidence from genetic testing ethics debate supports before submitting the exit response named on today's page.
- • Argue that the couple should decide together with consent and privacy protected, since results describe shared family information.
- • Push for testing because a positive result means the parents are affected and their child will have the disease.
- • Wait until we learn what care or choices follow a positive result, since that sets whether knowing helps or burdens.
Response: State one choice, cite at least two evidence IDs, explain the rule that connects them, and add one limitation. Use it inside the one turn-in named under Turn in; it is not a separate submission.
Claim ceiling: Today's evidence supports a classroom claim about genetic testing ethics debate. It cannot prove causation, diagnose a real patient, or justify action outside this room.
Reason for review: Your team must decide what the evidence from genetic testing ethics debate supports before submitting the exit response named on today's page.
Context: Genetic knowledge is powerful and permanent, so the people it describes deserve consent, privacy, and support before anyone acts on it.
- • T1: Read a short case: a couple learns both partners may carry a recessive disease .
- • T2: Pick a stance and gather two evidence points on benefits versus harms of testing.
- • T3: Define key terms: , recessive inheritance, , .
- • T4: Debate in assigned roles, citing autonomy, privacy, and potential discrimination.
- • T5: Write a two-sentence reflection naming the strongest opposing argument you heard.
- • E1: A defensible biomedical decision separates scientific evidence from value judgments, identifies who may benefit or be burdened, and states the uncertainty and tradeoffs that remain.
- • E2: Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
- • E3: Stake out a clear position supported by at least two evidence points.
Measurements: Use only the measurements, units, graph, or counts supplied in today's task. No additional patient measurement is implied.
Uncertainty: This is a composite classroom scenario. Missing history, measurements, or confirmation tests remain unknown and limit the conclusion.
Students often think if the test comes back positive for status, the parents are sick or the baby is guaranteed to have the disease. The trap: means you hold one recessive copy and are healthy; two carriers have a 25 percent chance per child, not a certainty. The trap is treating a probability as a diagnosis, which turns a manageable risk into false panic.
- CER:
- Claim, Evidence, Reasoning: make a claim, back it with evidence, explain your reasoning.
- SOP:
- Standard Operating Procedure, the exact steps to follow (especially in a lab).
- Tracker:
- Your PLTW progress log where you record completed evidence.
- myPLTW:
- The PLTW course site where you do the online activities. Find it in Clever with your Microsoft sign-in, right next to Schoology.
Tap the speaker to hear a term. Add two of these to your notebook glossary with a definition and an example in your own words.
Pick just 2 or 3 words from today and make them yours: write what each one means in your own words, name the context clue or evidence that helped, then give one example from what you actually did in Genetic testing ethics debate. Try your own words first; the glossary is there if you get stuck. This is voluntary and counts as extra credit, so keep it short.
Saved on this device. Show Mr. Mendoza or add these to your notebook glossary to claim the extra credit.
Part 2 of 4 · Directions in plain English▸
2.1 Open your materials
2.2 Start the work
Read a short case: a couple learns both partners may carry a recessive disease allele.
Show all 5 required steps
- Read a short case: a couple learns both partners may carry a recessive disease allele.
- Pick a stance and gather two evidence points on benefits versus harms of testing.
- Define key terms: carrier, recessive inheritance, genetic risk, informed consent.
- Debate in assigned roles, citing autonomy, privacy, and potential discrimination.
- Write a two-sentence reflection naming the strongest opposing argument you heard.
Lost your place? You should have a stance picked and two evidence points written (step 2). If not, reread the case (step 1), then jump into your assigned debate role citing autonomy, privacy, and discrimination (step 4).
- 0-8 minHook: read the couple case silently, annotate one question you have.
- 8-18 minDefine vocabulary: , recessive, , .
- 18-35 minStance selection and evidence gathering (2 points per side).
- 35-60 minStructured debate in assigned roles; teacher facilitates with vocabulary prompts.
- 60-72 minIndividual reflection: write two sentences naming the strongest opposing argument.
- 72-80 minWhole-class debrief and exit-ticket submission.
- • Today we tackle a real dilemma families face: should you test before you know there is a problem?
- • Genetic technology can reveal risks decades before symptoms appear, but that information carries weight.
- • You will argue both sides, then reflect on the strongest counterpoint, which is the mark of a scientific thinker.
- • This connects directly to your end-of-course WebXam content on biotechnology research and handling genetic data responsibly.
PLTW connection and today's work
In myPLTW, open Lesson 2.2 Decoding a Diagnosis and go to Activity 2.2.3 An Inheritance Story. Read all of it before the debate.
Today's stopping point: You finished the DNA and protein modeling phase of Lesson 2.2. Today continues Lesson 2.2 with its genetic-risk and carrier-screening focus. The bioethics reflection should be submitted by end of today.
PLTW activity titles identify the course connection. If your account will not open, use the posted materials for today and tell Mr. Mendoza. Do not mark an online activity complete unless you completed it.
Course connection
- Activity 2.2.3 An Inheritance Story
Use the turn-in directions in Part 4 of this page. Do not create a second submission unless your teacher asks for one.
Show another explanation or a smaller first step
Need help? Choose a starting point
Part 3 of 4 · Worked example▸
This is a parallel case, not your own. Read it for the order of the work, then do your own in Part 4.
Parallel case (not today's prompt): A student mails a saliva sample to a direct-to-consumer ancestry company and later chooses to upload the raw DNA file to a public relative-matching database. Should she do that, given that her results also reveal information about siblings and cousins who never agreed to be tested?
Claim: She should not upload her raw DNA to the public relative-matching database without first talking to the close relatives it would expose.
Evidence: Her genome is roughly half shared with each sibling and a smaller fraction shared with cousins, so a public match can identify those relatives and hint at their health risks even though only she gave informed consent. Cases where uploaded consumer DNA was used to identify distant family members show that one person's upload can pull in relatives who never made that choice.
Reasoning: Informed consent normally covers the person being tested, but here the same data speaks for people who were never asked, which limits their autonomy over their own genetic privacy. Weighing her freedom to explore her ancestry against the relatives' right to control what is revealed about them, the more responsible step is to seek their agreement first rather than upload by default.
Reflection (two sentences, the exit-ticket format): The strongest opposing argument I heard was that her DNA is hers and relatives have no veto over what she does with it. It did not change my claim, because the shared part of the genome is not hers alone to publish.
(Vocabulary used correctly: informed consent, autonomy, genetic privacy.)
This model shows the level of evidence and organization needed to complete: A worked CER on a parallel case (a direct-to-consumer ancestry DNA upload) that ends with the two-sentence reflection the day's exit ticket asks for, naming the strongest opposing argument; it models the format without answering today's carrier-screening prompt.
- Name the prompt or task.
- Answer it directly with the key evidence.
- Check that the response matches the requested format.
Keep the structure. Replace the question, facts, measurements, and evidence. Then recheck units, vocabulary, and whether the conclusion goes beyond the evidence.
Also due today: Submit your two-sentence reflection as one PDF to Schoology assignment for this lesson in Schoology before you leave.
A review board sorts scientific evidence, stakeholder needs, possible benefits, possible burdens, and uncertainty before choosing a policy.
- Which statements are scientific evidence?
- Which statements express a value or priority?
- Who receives the benefit and who carries the burden?
Use science to estimate consequences, then state the value judgment and tradeoff that determine the decision.
A review-board model organizes reasoning but does not make one ethical principle automatically outweigh every other principle.
- • Evidence cards map to source-backed findings.
- • Stakeholder cards map to affected people and priorities.
- • The recommendation maps to an explicit tradeoff with a named uncertainty.
Part 4 of 4 · Your work▸
Check your work before submitting
- Stake out a clear position supported by at least two evidence points.
- Use carrier and inheritance vocabulary accurately during the exchange.
4.1 Turn in your work
DueCheck the Schoology assignment for this day- Hand in
- Two-sentence written reflection naming the strongest opposing argument encountered during the debate.
How to submit and name your file
Submit your two-sentence reflection as one PDF to the Schoology assignment for this lesson in Schoology before you leave.
In Schoology, open your course and the assignment for this lesson. Attach your file, select Submit, and check that it appears in the submission.
PDF upload helpYou get two school days for every day you were absent, so this deadline moves with you.
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- Design a Visit: final proposal (upload by Fri 10/30)(the project upload for this week)
- Today's Lesson · Fri 10/30 · Wk10 · Cancer cells under the microscope, then Kai's biopsy and diagnosis(today's lesson page: the goal, the data, the steps, and what to turn in are all on it)
Link will not open? Open Schoology, choose your course and section, and find the title shown above.
- CompleteEvery required part of the artifact is present, nothing left blank.
- AccurateThe science and the data are correct and match the evidence.
- Scientific reasoningYou explain your claim with evidence and reasoning (CER), not just an answer.
- Professional communicationClear, organized, labeled, and written the way a clinician or scientist would.
- SubmittedGo to Schoology to turn this in. Submit one PDF. Schoology attaches your name to your upload; on the page itself, write your period and code. Name the file: FirstName LastName - Assignment Title - YYYY-MM-DD.pdf. If you cannot get in, see Mr. Mendoza. Do not skip the work.
How this lesson connects
Keep using what you learned last class: Should children reach the age of consent before cochlear implants or other medical interventions are allowed? Today: Genetic tests reveal permanent, shared family information, so decisions about testing must be governed by consent and privacy rather than by any single person's wishes.
Practice: try a question, then check your answer▸
Claim ceiling for this check: Today's evidence supports a classroom claim about genetic testing ethics debate. It cannot prove causation, diagnose a real patient, or justify action outside this room.
Two healthy carrier parents ask you: what is the chance our next child is affected by this recessive disease, and does a positive carrier test mean we are sick?
Write an answer and pick a confidence to unlock the key.
Fast retrieval with instant answers, not the commit-then-reveal check above. Try each from memory first: write what you remember about the earlier units, then check yourself here.
Missed class or ready for more?▸
Optional practice for this unit's lab skills. Nothing in it is due today. This lesson has more than one, and they cover different skills.
Wednesday you will sort and interpret a practice on paper. Before then: (1) review how chromosomes are numbered and paired by size and centromere position; (2) sketch the difference between a normal diploid karyotype and one with trisomy 21; (3) define , , and as they apply to a diagnostic procedure.
What today's skills lead to. These are real health-science careers this course builds toward. Tap one to see, on the US Department of Labor's O*NET site, what the job actually involves, what it pays, and how fast it is growing.
At home: read the couple case on this page, write two evidence points for each side of the question (should at-risk couples be required to receive before testing?), then write the two-sentence reflection naming the strongest opposing argument.
NHGRI Genetic CounselingSubmit your two-sentence reflection as one PDF to the Schoology assignment for this lesson in Schoology before you leave.
Class still runs. Complete today's work as this page describes (it is self-guided). Need the concept taught without a teacher? Use this authoritative explainer:
NHGRI: how to read a pedigreeSources: slides, readings, and resources▸
The deck carries the prior idea forward, lets you inspect an analogy, maps the rule to biology, and ends with the same evidence decision and exit ticket used on this page.
Hand-picked readings and interactives for this lesson, from authoritative open organizations and PLTW's own public course outline.
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