Which statement regarding chromosomal abnormalities is most accurate?
A) Chromosomal abnormalities occur in approximately 10% of newborns.
B) Abnormalities of number are the leading cause of pregnancy loss.
C) Down syndrome is a result of an abnormal chromosomal structure.
D) Unbalanced translocation results in a mild abnormality that the child will outgrow.

Question

Quizplus · Accepted Answer

Aneuploidy is an abnormality of number that is also the leading genetic cause of mental retardation.Chromosomal abnormalities occur in fewer than 1% of newborns.Down syndrome is the most common form of a trisomal abnormality,an abnormality of chromosome number (47 chromosomes).Unbalanced translocation is an abnormality of chromosomal structure that often has serious clinical effects.

Which Statement Regarding Chromosomal Abnormalities Is Most Accurate