If a trait that is normally recessive, like blue eyes, occurs in an animal, is that trait dominant in that specific animal's phenotype? assuming that animal mates with an animal carrying the traits for both blue and brown eyes, are the offspring of that pairing more likely to have blue eyes than brown?

If one animal has blue eyes and the other has brown each will pass one color of their eye to the other

option a is correct i.e.

only sodium ions can pass through the membrane.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

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