In rats, gene b produces black coat color if the genotype is b–, but black pigment is not produced if the genotype is bb. at an independent locus, gene d produces yellow pigment if the genotype is d–, but no pigment is produced when the genotype is dd. production of both pigments results in brown coat color. if neither pigment is produced, coat color is cream. determine the genotypes of parents of litters with the following phenotype distributions. 4 brown, 4 black, 4 yellow, 4 cream 3 brown, 3 yellow, 1 black, 1 cream 9 black, 7 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.  

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answer: dna

because all cells have genes

idk and i also need to know where are those bio brainy acts lol