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Down Syndrome is caused by which additional chromosome?

A.

20

B.

21

C.

22

D.

19

Answer and Explanation

The Correct Answer is B

A. 20. Trisomy 20 is not associated with Down syndrome.

 

B. 21. Down syndrome results from an extra copy of chromosome 21, called Trisomy 21.

 

C. 22. Trisomy 22 leads to other syndromes but not Down syndrome.

 

D. 19. Trisomy 19 is incompatible with life and does not cause Down syndrome.


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View Related questions

Correct Answer is A

Explanation

A. Anticonvulsants: Anticonvulsants are the primary treatment to control and prevent seizures by stabilizing neuronal activity.

B. Anticoagulants: Anticoagulants are used to prevent blood clots, not seizures.

C. Antibiotics: Antibiotics treat infections, which may cause seizures indirectly, but they are not used to treat seizures themselves.

D. Antidepressants: Antidepressants manage mood disorders, not seizure activity.

Correct Answer is B

Explanation

A. Describing manifestations of the illness: Preschoolers lack the cognitive ability to describe symptoms in detail.

B. Relating fears to magical thinking: Magical thinking is characteristic of preschoolers, and they may associate illness with punishment or fantastical causes.

C. Awareness of body function: This is more typical of school-age children, not preschoolers.

D. Understanding cause of illness: Preschoolers do not have the cognitive development to understand illness causation fully.

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