Do you have a source for that claim? Might you be misquoting a different popular statistic that g accounts for roughly have of intelligence between individuals?

Do you have a source for that claim? Might you be misquoting a different popular statistic that g accounts for roughly have of intelligence between individuals? Or perhaps the figure that intelligence is about 50% heritable?[0] It is important to note that heritability of a trait and the extent to which a trait is genetically caused are not the same. It is possible for a trait to be eg. 80% caused by genetics and only 60% heritable, even on the average. This can be the case where the trait is defined by multiple genes (and non-coding DNA) where the proportion of the different genes matters and where specific combinations of genes are necessary. Also heritability of intelligence has been reported as higher than 75%. [0] Eg. https://www.nature.com/articles/s41380-021-01027-y#Sec8 https://www.nature.com/articles/s41380-021-01027-y#Sec8