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?
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35 years or older at delivery- How many pregnancy losses are typically needed to define 'recurrent pregnancy loss' as a referral indication?
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Two or more consecutive losses- Why is a family history of a known genetic disorder a standard indication for genetic counseling?
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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)?
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Increased risk of autosomal recessive conditions in offspring- What prenatal finding typically prompts a genetic counseling referral before further testing?
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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?
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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?
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Known parental carrier status- Which ethnic group has an increased carrier frequency for Tay-Sachs disease, prompting targeted carrier screening?
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Ashkenazi Jewish population- What is a common genetic counseling referral indication when a child has developmental delay or intellectual disability with no clear cause?
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Unexplained developmental delay or intellectual disability- What family pattern of cancer diagnoses suggests referral for hereditary cancer risk assessment?
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Early-onset cancers or clusters of cancer across multiple relatives- In a standard pedigree, what shape represents a male individual?
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A square- In a standard pedigree, what shape represents a female individual?
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A circle- What does a filled (shaded) pedigree symbol indicate?
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An affected individual- What does a horizontal line connecting two pedigree symbols represent?
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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?
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The line of descent to their offspring
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