In a study involving genetic traits, a sample is large enough if it:
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A. reflects the genetic variation of a population.
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B. provides plenty of factors to observe.
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C. would be too difficult to make even larger.
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D. includes at least 10 members.
SUBMIT

A. reflects the genetic variation of a population.

Explanation:

"Genetic variation" refers to the diversity of organisms' DNA. This also refers to the differences among the genes in a population.

"Genetic trait" refers to the characteristics possessed by an individual according to his DNA. This can be transferred from the parent to the off spring.

In order to know whether a sample is large enough, it is important to consider whether it reflects the genetic variation of the population. This will allow diversity of the organisms, thereby involving many characteristics, which is important in the study.

So, this explains the answer.

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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