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Biomedical subjects

G R Clark

Publications and source records attributed to G R Clark.

33 records · Page 2Linked to original sources

Mollusk shell: daily growth lines.

Ridges forming the concentric sculpture on the shells of laboratory-grown specimens of Pecten diegensis Dall show daily periodicity. Missing growth lines account for all scatter in the data, so that the maximum, not the average, line count is most representative. The variation in spacing between growth lines can be correlated among specimens.

Animals↗

Incidence of gross chromosomal errors among tall criminal American males.

Chromosome studies on 129 tall men surveyed in four different institutions for the care of criminal males in Pennsylvaniia showed that 1 in 11 subjects displayed aneuploidy of the sex chromosomes; specifically, five cases of 47,XYY and seven cases of Klinefelter syndrome were identified. All the aneuploid subjects were mentally ill; none had been cytogenetically diagnosed.

Aneuploidy↗