Trisomy refers to
A)the development of three primary germ layers.
B)three layers of cells.
C)the formation of triplets.
D)there being three copies of a given chromosome instead of two.
E)the formation of the three extra-embryonic membranes.

Question

Quizplus · Accepted Answer

Trisomy refers to the presence of three copies of a particular chromosome instead of the usual two. This is typically caused by a genetic mutation or error during cell division. Down syndrome, for example, is a condition caused by trisomy of chromosome 21.

Trisomy Refers to