You are working to conserve a population of California Scrub Jays, Aphelocoma californica, that are adapting to increased temperatures in Northern California. You find alleles at two loci that increase heat tolerance by 0.98 and 0.46 Co, and are found at frequencies of 0.23 and 0.17, respectively. If the total phenotypic variance in heat tolerance, including environmental effects, is 2.13 Co, what is the narrow sense heritability of heat tolerance associated with these two loci?
Group of answer choices
0.8554
0.338
0.1878
0.40