Which statement is true? a.) an allele is one form of gene. b.) a gene consists of two traits. c.) an allele is made up of two genes. d.) most alleles have many genes. plzzz i needs !

c.

Explanation: Since there are two parents the allele will have two genes. One from each parent.

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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bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.