PEDIGREE DRAWING WORKSHOP Flashcards
1
Q
what is a pedigree
A
A pedigree is a genetic representation of a family tree that
indicates the relationships between family members and
illustrates the inheritance of a trait or disease through several
generations.
2
Q
why draw a pedigree
A
- Establish a pattern of inheritance.
- Identify at-risk family members
- Develop patient rapport
- Educate patient and explore understanding
- Directs medical management
- Promote risk assessment
3
Q
Step 1 of genetic counseling
A
gathering info PEDIGREE
4
Q
Advantages of a family pedigree
A
Easy to read
Fast
Permanent and clear record of family genetic info
Combines medical data and biological relationships
Use of standardized symbols
5
Q
Collection of family history
Produce a three-generation pedigree that
includes
A
- Patient’s first, second, and third-degree relatives
- Information on maternal and paternal relatives
- Representation of “full” and “half” relationships
- Affected and unaffected individuals
- Date of collection and name of the collector
- Legend or key
- Indication for referral
6
Q
Collection of family history
Information to be collected
A
- Age, date of birth/year
- Relevant health information
- Diagnosis, age at diagnosis
- Age at death or year of death
- Cause of death
- Ethnic background for each biological grandparent
- Infertility, or no children by choice
- Consanguinity
- Pregnancy complications (note gestational age)
7
Q
CONSANGUINITY
A
related by blood
8
Q
what to consider when drawing a pedigree
A
• Key • Indicate proband with an arrow • Generation numbers • Roman Numerals • Left side of pedigree • Birth order (optional) • Arabic Numerals - Date and signature
