10 Questions
What percentage of trisomy 21 pregnancies conceived end as spontaneous abortions or stillbirths?
80%
What is the approximate incidence of Down syndrome amongst livebirths?
1/800
What is the most common cause of trisomy 21?
Nondisjunction event
What percentage of trisomy 13 conceptuses result in livebirths?
1-2%
What is the approximate incidence of Patau syndrome amongst liveborn infants?
1/25000
What percentage of trisomy 18 conceptuses end as early spontaneous abortions?
95%
What percentage of spontaneous abortions will have trisomy 18?
1%
What is the approximate incidence of Edward's syndrome amongst livebirths?
1/8000
What percentage of stillbirths will have trisomy 21?
1%
What percentage of spontaneous abortions will have trisomy 21?
1%
This quiz covers Chromosomal aberrations, including numerical and structural alterations, and meiotic nondisjunction. Learn about aneuploidy, monosomy, trisomy, and more. Test your knowledge of genetic anomalies in embryology.
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