Mice created with a third copy of just the critical chromosome 21 region produced___.
A)less of a protein that supports neural survival
B)toxins that caused a buildup of neurofibrillary tangles
C)an abnormally high amount of testosterone
D)symptoms that mimicked Korsakoff's syndrome

Question

Quizplus · Accepted Answer

Studies have shown that mice created with a third copy of just the critical chromosome 21 region produced less of a protein called Dyrk1a that supports neural survival. This is similar to what occurs in individuals with Down Syndrome, who also have an extra copy of chromosome 21.

Mice Created with a Third Copy of Just the Critical