You might get away with Spearman rank order if the genotype activity can be construed as ordinal (e.g., recoded: 1, 2, 3).

That would mean using something like

P.S., What is the purpose of this analysis? What are your trying to say? Could regression be used? It took me awhile to tell myself that I can just use linear regression instead of correlations and logistic regression instead of contingency tables sometimes. Which these approaches have more options and at times better interpretability.Code:`PROC CORR DATA=yours / SPEARMAN;`