If Each Interphase Nucleus in 100 Epithelial Cells from a Rat

Multiple Choice

If each interphase nucleus in 100 epithelial cells from a rat contains a single Barr body, one can conclude that

A) the cells have an excess of DNA methyltransferase.
B) the cells have a deficiency of DNA methyltransferase.
C) all of the chromatin in these cells is inactive.
D) the cells came from a male rat.
E) the cells came from a female rat.