GENETICS

Huntington disease autosomal dominant pedigree

A Huntington disease pedigree is a family diagram used to discuss a reported autosomal dominant pattern. It arranges relatives by generation and marks affected and unaffected family members, with the proband identified when relevant. This can make a multigenerational family history easier to understand in an educational setting. The visual is not a diagnosis and cannot determine whether an individual has a genetic variant. Ages of onset, symptoms, test results, and personal circumstances matter and should be discussed with an appropriate clinician or genetic counselor. Share any health information carefully and only with the people who need it for the intended discussion.

UPDATED 2026-09-24
EXAMPLEHuntington disease autosomal dominant pedigree
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CASE ANALYSIS

Scenario

Autosomal dominant inheritance

Key decisions

  • Use dominant mode: Match the chart header to the inheritance pattern.
  • Trace affected relatives: Show the pattern in consecutive generations.
  • Keep unaffected relatives: Make the contrast visible.
  • Mark the proband: Identify the person whose history prompted the chart.

When to reuse this

Use this as an educational autosomal-dominant example; individual risk and testing decisions require qualified review.

FAQ

Frequently asked questions

What is an autosomal dominant pedigree?01
It is a family diagram used to show a reported dominant pattern across generations.
Why mark unaffected relatives?02
They help make the documented family pattern clear without implying a diagnosis.
Can a family tree predict Huntington disease?03
No. A pedigree summarizes family history; testing and risk assessment need qualified clinical guidance.
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