In one study, mice that were genetically engineered to express R6/2 (the Huntington's disease gene) exhibited motor disturbances that _______ and these mice also showed _______.
A) improved over time; enhanced cognitive function
B) were present from birth onward; a tendency to develop diabetes
C) worsened over time; a shortened life span
D) disappeared with practice; spatial learning deficits

Question

Quizplus · Accepted Answer

The sentence states that the motor disturbances "worsened over time" indicating a progressive decline in motor function. Additionally, the sentence does not mention any improvement in cognitive function, tendency to develop diabetes or disappearance of symptoms with practice, but does mention a shortened life span.

In One Study, Mice That Were Genetically Engineered to Express