Match each definition to one of the following items.
-The most common chromosomal abnormality that is characterized by an extra chromosome 21

Question

Quizplus · Accepted Answer

Down syndrome is caused by an extra copy of chromosome 21.

Answer: A
 Klinefelter syndrome is characterized by the presence of an extra X chromosome in males.

Answer: B
 Spina bifida is a neural tube defect that occurs when the spinal column fails to close properly during fetal development.

Answer: C
 Meckel diverticulum is a congenital abnormality in which a small pouch forms in the wall of the intestine.

Answer: D
 Marfan syndrome is a genetic disorder that affects the connective tissues in the body.

Answer: E
 Tetralogy of Fallot is a heart defect that is present at birth and involves four abnormalities in the structure of the heart.

Match Each Definition to One of the Following Items