Give a characteristic of heterozygous type

Heterozygous refers to having different alleles for a particular trait.

When alleles are heterozygous in complete dominance inheritance, one allele is dominant and the other is recessive.

The genotypic ratio in a heterozygous cross where both parents are heterozygous for a trait is 1:2:1.

Explanation:

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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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