The electric potential, when measured at a point equidistant from two particles that have charges equal in magnitude but of opposite sign, is

V = 0

Explanation:

To find the potential at the middle of the two charges with opposite signs, you use the following formula:

     (1)

where you have used the fact that the charges are the same and the distances are the same.

The electric potential is zero at the point in the middle of the two charges

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).