Yes, HAPLOTYPES is a Scrabble word!

Letter values in Scrabble US: H 4, A 1, P 3, L 1, O 1, T 1, Y 4, P 3, E 1, S 1.

Is it a valid word?

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

(genetics) a combination of alleles (for different genes) that are located closely together on the same chromosome and that tend to be inherited together