The term 'dominate' has several meanings: 1: be larger in number, quantity, power, status or importance; 2: be in control; 3: be greater in significance than; 4: look down on; 5: have dominance...
Every animal cell has pairs of chromosomes, with only the sex chromosomes only partly being paired.
Traits are based on the genes.
Dominant genes only need one to be present for the trait...