Most traits in sexually reproducing organisms are the result of what type of gene?

Usally it's the X gene

Explanation:

The X gene is usally carries most of the information while the Y gene is usally just to tell the body that your a male plus some other smaller details.

option a is correct i.e.

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.