How do you do Punnett Squares: X-linked? The assignment is on color blindness and how it affects kids being born. They are asking male and female phenotypes, genotypes and allele(s). depending on which one is colorblind or a carrier. Then how it would affect their having children together if one is color blind or a carrier. And then fill out the punnet square with male and female info.

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.  

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correct answer is a. and d.