A comment on Jensen's note on sex linkage and race differences in spatial ability.
D000367:Age Factors; D002648:Child; D005260:Female; D005808:Genes, Recessive; D008040:Genetic Linkage; D005828:Genetics, Population; D006801:Humans; D008297:Male; D044469:Racial Groups; D012737:Sex Factors; D013028:Space Perception; D014960:X Chromosome