Familial Down syndrome is a result of
A) inversion.
B) deficiency.
C) gene duplication.
D) translocation.

Question

Quizplus · Accepted Answer

Familial Down syndrome is caused by a Robertsonian translocation, where part of chromosome 21 is translocated onto another chromosome, typically chromosome 14. This results in the usual genetic makeup for Down syndrome (three copies of chromosome 21), but in a way that can be inherited through families.

Familial Down Syndrome Is a Result of