What causes the inside of a membrane to become positively charged during an action potential. A) negatively charged ions rush out
B) positively charged ions rush in
C) positively charged ions rush out
D) negatively charged ions rush in

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of