(B) The predicted mendelian (1:2:1) and experimental ratio of genotypes of progeny from smyhc1R673H/+ in-crosses demonstrates survival at the indicated ages. This ratio quickly skewed toward an overrepresentation of smyhc1+/+ fish with no representation of smyhc1R673H/R673H after 5 dpf. There is also dropout of smyhc1+/R673H fish into adulthood. Number of fish counted per group is indicated. 