What is a dominant gene? A gene that is identical in most of the world's population.

A gene that does not change from generation to generation.

A gene with a mutation that affects the surrounding genes.

A gene that is always expressed physically when present.

1 or A

Explanation:

Don't trust me but that's what i think because dominance is the phenomenon of one variant of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second recessive.

dude i stopped reading after the first 7 words but hey you seem real smart thats awesome have a great day