X-linkage, lyonization and a female premium in the verbal IQ results of Orkney schoolchildren, 1947-75.
This paper reports the preliminary findings of an analysis of the Moray House (verbal IQ) results of a base sample of 4383 Orkney children due to be tested in the schools at age 11 +/- 1 1/2 years in 1947-75. Girls enjoy a 3.63% premium relative to phenotypically equivalent boys at test age. Relationships within the sample, which includes some members of the parental generation, are known. The trait is found to be X-linked, with nine phenotypes in the boys, and lyonization is involved.
Goodman
J D
JD
Anderton
R B
RB
D002648:Child; D015331:Cohort Studies; D004303:Dosage Compensation, Genetic; D005260:Female; D008040:Genetic Linkage / Q000235:genetics*; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D010641:Phenotype; D012111:Residence Characteristics; D012606:Scotland; D012727:Sex Characteristics; D013334:Students / Q000523:psychology*; D014705:Verbal Behavior; D014960:X Chromosome / Q000235:genetics*