prepotency

1. The condition of being greater in power, influence, or force than another or others; predominance.
2. Genetics. The ability of one parent, variety, or strain to transmit individual traits to an offspring, apparently to the exclusion of the other parent, variety, or strain.

noun

The condition or fact of being dominant: ascendance, ascendancy, dominance, domination, paramountcy, predominance, preeminence, preponderance, preponderancy, supremacy. See over/under.