MONOHYBRIDS
Scrabble letter values: M3O1N1O1H4Y4B3R1I1D2S1 = 22
Definition
MONOHYBRIDS is the plural of MONOHYBRID.
noun MONOHYBRID: a hybrid produced by crossing parents that are homozygous except for a single gene locus that has two alleles (as in Mendel's experiments with garden peas).