Teratology Lecture 1: Conjoined Twins and the History of Teratology

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What is the term for a specific abnormality that results from disruption of normal developmental processes that depend on time, not on the agent?

Disruption (correct)

Malformation

Syndrome

Deformation

Which type of chromosomal abnormality is usually caused by a non-disjunction error in cell division?

Mutant genes

Teratogens

Numerical chromosomal abnormalities (correct)

Structural chromosomal abnormalities

What is the term for a recognized pattern of malformations with a given etiology?

Syndrome (correct)

Disruption

Deformation

Malformation

Which of the following is an example of a teratogen?

Warfarin Signup and view all the answers

What is the percentage of zygotes that have chromosomal aberrations?

6-7% Signup and view all the answers

What is the approximate incidence of trisomy 21 amongst livebirths?

1/800 Signup and view all the answers

What percentage of spontaneous abortions will have trisomy 18?

1% Signup and view all the answers

Approximately what percentage of trisomy 13 conceptuses will end as spontaneous abortions or stillbirths?

98% Signup and view all the answers

What is the approximate incidence of trisomy 18 amongst livebirths?

1/10000 Signup and view all the answers

Which trisomy is more common in livebirths than trisomy 13?

Trisomy 18 Signup and view all the answers

Teratology Lecture 1: Conjoined Twins and the History of Teratology

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Questions and Answers

What is the term for a specific abnormality that results from disruption of normal developmental processes that depend on time, not on the agent?

Which type of chromosomal abnormality is usually caused by a non-disjunction error in cell division?

What is the term for a recognized pattern of malformations with a given etiology?

Which of the following is an example of a teratogen?

What is the percentage of zygotes that have chromosomal aberrations?

What is the approximate incidence of trisomy 21 amongst livebirths?

What percentage of spontaneous abortions will have trisomy 18?

Approximately what percentage of trisomy 13 conceptuses will end as spontaneous abortions or stillbirths?

What is the approximate incidence of trisomy 18 amongst livebirths?

Which trisomy is more common in livebirths than trisomy 13?

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