In humans the gene for brown eyes is dominate over the gene for blue eyes which is recessive. If two blue eyed parents have six children how many of their children will have blue eyes?

three or four

Explanation:

if you think about it parent with both blu eyed doesn't exactly mean that because of that all their children will have blue eyes...

three out of six of them will have it the remaining four will probably have light or dark brown

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

read more on -