I didn't say black people were dumber than white people.
Only you have said that based on your complete lack of understanding averages.
I did say IQ is 60-80% genetic, because there are numerous peer-reviewed studies that show it to be true. This is not
my claim, it's based on science.
The heritability of IQ for adults is between 57% and 73%
[6]with some more-recent estimates as high as 80%
[7]and 86%.
[8]Genome-wide association studies have identified inherited genome sequence differences that account for 20% of the 50% of the genetic variation that contributes to heritability.
[9]IQ goes from being weakly correlated with genetics, for children, to being strongly correlated with genetics for late teens and adults. The heritability of IQ increases with age and reaches an asymptote at 18–20 years of age and continues at that level well into adulthood. This phenomenon is known as the
Wilson Effect.
[10]Recent studies suggest that family and parenting characteristics are not significant contributors to variation in IQ scores;
[11]however, poor prenatal environment, malnutrition and disease can have deleterious effects.
[12][13]
(Table 2, "Verbal Ability", "Adult participants") Bouchard, Thomas J., and Matt McGue. "Genetic and environmental influences on human psychological differences." Developmental Neurobiology 54.1 (2003): 4-45.
Plomin, Robert, and Ian J. Deary. "Genetics and intelligence differences: five special findings." Molecular psychiatry 20.1 (2015): 98-108.
Panizzon, Matthew S., et al. "Genetic and environmental influences on general cognitive ability: Is g a valid latent construct?." Intelligence 43 (2014): 65-76.
Bouchard, Thomas J. (2013). "The Wilson Effect: The Increase in Heritability of IQ With Age".
Twin Research and Human Genetics.
16(5): 923–930.
doi:
10.1017/thg.2013.54.
ISSN1832-4274.
PMID23919982.
Beaver, KM. (2014). "A closer look at the role of parenting-related influences on verbal intelligence over the life course: Results from an adoption-based research design".
Intelligence.
46: 179–187.
doi:
10.1016/j.intell.2014.06.002.
I hope you're wearing your helmet.