Yes, GENES is a Scrabble word!

Letter values in Scrabble US: G 2, E 1, N 1, E 1, S 1.

Is it a valid word?

GENES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

(genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity