Submitted by **Chance_Literature193** t3_11i764u
in **askscience**

My understanding is h^2 = Var(Genotype)/ Var(Geno + Environment). I am trying to figure the correct way to interpret this.

The way I read that 100% heritable corresponds phenotype dependent 100% on genes. But! this still doesn’t tell us probability of trait given parent has trait. I.e. it measures correlation between genes and trait but not correlation between parents phenotype and a trait?

Is this the correct interpretation? If so is there a statistics that describes probability of phenotype given parents phenotype (outside pundit square case)?

perta1234t1_jaxptrm wrote100% h2 means all trait variation is of genetic origin. Among other things, it does not consider the trait mean value in any way. Anyway, h2 is more quantitative genetics issue. The probability sounds bit more like qualitative genetics question. Sometimes the difference is not very strict.