Podcast
Questions and Answers
What percentage of people with Down syndrome have trisomy 21?
What percentage of people with Down syndrome have trisomy 21?
- 80%
- 98%
- 95% (correct)
- 90%
Approximately how many cases of Down syndrome occur per 10,000 live births in the United States?
Approximately how many cases of Down syndrome occur per 10,000 live births in the United States?
- 5 cases
- 12 cases
- 7 cases
- 9.2 cases (correct)
What is the term for a mixture of normal diploid and trisomy 21 cells?
What is the term for a mixture of normal diploid and trisomy 21 cells?
- Dysmorphic features
- Translocation
- Mosaicism (correct)
- Trisomy
What is the procedure that confirms the diagnosis of Down syndrome?
What is the procedure that confirms the diagnosis of Down syndrome?
What percentage of individuals with Down syndrome have a Robertsonian translocation?
What percentage of individuals with Down syndrome have a Robertsonian translocation?
What is the estimated detection rate of trisomy 21 using maternal age and measurement of nuchal translucency?
What is the estimated detection rate of trisomy 21 using maternal age and measurement of nuchal translucency?
What is the estimated false-positive rate of first-trimester screening by means of maternal age and measurement of nuchal translucency?
What is the estimated false-positive rate of first-trimester screening by means of maternal age and measurement of nuchal translucency?
What is the advantage of chorionic villus sampling over amniocentesis?
What is the advantage of chorionic villus sampling over amniocentesis?
What is the benefit of using fluorescent in situ hybridization (FISH) in prenatal diagnosis of trisomy 21?
What is the benefit of using fluorescent in situ hybridization (FISH) in prenatal diagnosis of trisomy 21?
How long does karyotype analysis typically require after amniocentesis?
How long does karyotype analysis typically require after amniocentesis?
What is the benefit of combining first-trimester screening with measurement of maternal serum free betahCG subunit and pregnancy-associated protein A (PAP A)?
What is the benefit of combining first-trimester screening with measurement of maternal serum free betahCG subunit and pregnancy-associated protein A (PAP A)?
What is the primary reason for using ultrasound examination in combination with the triple test?
What is the primary reason for using ultrasound examination in combination with the triple test?
Which of the following ultrasonographic findings is most commonly associated with trisomy 21?
Which of the following ultrasonographic findings is most commonly associated with trisomy 21?
What is the benefit of using ultrasound measurement of nuchal translucency in first-trimester screening for trisomy 21?
What is the benefit of using ultrasound measurement of nuchal translucency in first-trimester screening for trisomy 21?
What is the primary advantage of using amniocentesis in pregnant women 35 years or older?
What is the primary advantage of using amniocentesis in pregnant women 35 years or older?
What is the benefit of using the triple test in combination with ultrasound examination?
What is the benefit of using the triple test in combination with ultrasound examination?
Which of the following is a characteristic of trisomy 21 detected by ultrasound examination?
Which of the following is a characteristic of trisomy 21 detected by ultrasound examination?
