Karyotype case analysis
Tue, Oct 27, 2026 · Week 10 · Principles of Biomedical Technology (Principles of Biomedical Science)
Today's goal: Students individually arrange and interpret a karyotype to identify a chromosomal abnormality in a patient case.
This is a model of the work you should turn in today. Use it to check your own: match the structure and the level of detail, do not copy it. Your data and wording should be your own.
Karyotype lab (Patient A):
- SOP followed: cut each chromosome image, sort by size (largest to smallest), align by centromere position and banding pattern, place into 22 numbered autosome pairs plus the sex pair.
- Variables: independent variable is the patient's chromosome images; dependent variable is the final pair count and arrangement.
- Result: 22 normal autosome pairs and XX, but chromosome 21 has three copies instead of two.
- Abnormality named: Trisomy 21 (Down syndrome).
- Procedural limitation: if two chromosomes have similar size and banding, I could mis-pair them, which would produce a false reading; poor image quality makes this worse.
This model shows the level of evidence and organization needed to complete: A finished karyotype template with chromosome pairs ordered per the SOP, the identified abnormality named, and one stated procedural limitation.
- State the question and method.
- Present the observations and data with units.
- Explain the result, limitations, and next investigation.
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: Turn in the mounted karyotype and the written abnormality statement to the collection tray before the period ends.
Claim ceiling: Today's evidence supports a classroom claim about karyotype case analysis. It cannot prove causation, diagnose a real patient, or justify action outside this room.
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.
It builds this reusable test skill: Pairing chromosomes correctly and naming a procedural error source.
- Name the concept or data pattern being tested.
- Cross out choices that violate that rule or the evidence.
- Justify the best remaining choice before checking the answer.