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.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles