Which of the following is true of Down syndrome?
A) It primarily occurs in African American children.
B) It occurs when genetic imprinting goes awry.
C) Its symptoms include retardation of motor and mental abilities.
D) It is caused by the presence of an extra copy of chromosome Y.

Question

Quizplus · Accepted Answer

Down syndrome is characterized by a range of physical and mental challenges, including delays in motor skills and cognitive abilities. It is not specific to any race, is not caused by genetic imprinting errors, and involves an extra copy of chromosome 21, not the Y chromosome.

Which of the Following Is True of Down Syndrome