Huntington Disease (HD)transgenic Mice

Huntington disease (HD) transgenic mice

A) carry two copies of the human allele for HD.
B) have a single copy of the mouse HD gene.
C) are used to study changes in brain structure during the early stages of the disease.
D) are not useful for identifying possible drug treatments because the mice respond to drugs differently from humans.
E) are especially important for the study of the late stages of the disease.