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The Occurrences of Symmetrical and Asymmetrical Papillary Patterns on the Brahmins of Rajasthan

Published online by Cambridge University Press:  01 August 2014

Harkishin Kumbnani

Summary

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It is to assess the occurrence of symmetrical and asymmetrical combinations of papillary patterns on the Brahmins of Rajasthan (both the sexes) that this paper has been attempted. Symmetrical combinations are those patterns which are of the same type on the corresponding digits of Right and Left hands, while the asymmetrical are those which are of different types on the digits of corresponding Right and Left hands. All the Loops whether Ulnar or Radial are put into one category. The actual frequencies (AF) and chance frequencies (CF) of Various combinations are calculated.

1. The pattern combination W/W preponderate on I, II, & IV digits in both the sexes, while U/U is more often observed on the III and V digits. The pattern combination A/A is more common in males than in females, moreover this combination is more frequently noticed on II and III digits only.

2. Comparing the values of AF/CF ratio for the symmetrical combination of Whorls-Whorls, Loops-Loops and Arches-Arches in Brahmin series it is observed that the combination Loops-Loops exhibit the lowest value, while the Arches-Arches show the highest, indicating thereby that the tendency to symmetrical patterns is highest in Arches, lower in Whorls and lowest in Loops.

3. The least AF-CF value in the various asymmetrical combination shows the tendency to the repulsion of the combination. It is observed that this tendency is highest in Whorl-Arch and lowest in Loop-Arch combination.

4. A strong tendendy to repulsion on the part of asymmetrical patterns is observed and which consequently increases the tendency more towards the symmetrical patterns.

5. The value of AF/CF ratio is inversely proportionate to the value of chance frequency (CF) or in other words the decrease of CF value increases the AF/CF ratio

6. It is possible to calculate the chance frequencies (CF) when the percentile frequencies of various patterns are given.

Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 11 , Issue 1 , January 1962 , pp. 98 - 108
Copyright
Copyright © The International Society for Twin Studies 1962

References

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