Genetic counseling indications, pedigree analysis, and risk communication concepts for prospective genetic counseling students.
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- What maternal age threshold is commonly used as an indication for genetic counseling referral due to increased chromosomal aneuploidy risk?
- 35 years or older at delivery
- How many pregnancy losses are typically needed to define 'recurrent pregnancy loss' as a referral indication?
- Two or more consecutive losses
- Why is a family history of a known genetic disorder a standard indication for genetic counseling?
- It raises the chance that other relatives carry or will develop the same condition
- What reproductive risk is increased by consanguinity (parents being blood relatives)?
- Increased risk of autosomal recessive conditions in offspring
- What prenatal finding typically prompts a genetic counseling referral before further testing?
- An abnormal prenatal screening result, such as an abnormal cell-free DNA or serum screen
- Why do multiple congenital anomalies found in a fetus or newborn prompt genetic counseling referral?
- They suggest a possible underlying genetic syndrome needing evaluation
- If one parent is a known carrier of a genetic condition, what is this called as a referral indication?
- Known parental carrier status
- Which ethnic group has an increased carrier frequency for Tay-Sachs disease, prompting targeted carrier screening?
- Ashkenazi Jewish population
- What is a common genetic counseling referral indication when a child has developmental delay or intellectual disability with no clear cause?
- Unexplained developmental delay or intellectual disability
- What family pattern of cancer diagnoses suggests referral for hereditary cancer risk assessment?
- Early-onset cancers or clusters of cancer across multiple relatives
- In a standard pedigree, what shape represents a male individual?
- A square
- In a standard pedigree, what shape represents a female individual?
- A circle
- What does a filled (shaded) pedigree symbol indicate?
- An affected individual
- What does a horizontal line connecting two pedigree symbols represent?
- A mating or relationship line between two individuals
- What does a vertical line dropping down from a couple's mating line represent in a pedigree?
- The line of descent to their offspring