In genetics, the masking of one allele (an alternative form of a gene) by another allele. For example, if a heterozygous person has one allele for blue eyes and one for brown eyes, his or her eye color will be brown. The allele for blue eyes is described as recessive and the allele for brown eyes as dominant.
The state that exists when one person or group has power over another; SYN. ascendance, ascendence, ascendancy, ascendency, control.