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Heritability of fingerprints

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Heritability of fingerprints

Post  Felicity Martin on Mon Jul 23, 2012 4:34 am

Hi Marijn

Hi Martijn

I have reposted this as it is slightly different in context to the other post.

I was wondering about the heritability of fingerprints as I have noted consistencies across generations- I noted particularly that you stated the tented arch which is less common in a case close to home was present in my husband on both index fingers and also on both my two daughters hands- one having 3 classic tented arches... as this is supposed to be less common and I don't have them, where is the basis of this seeming genetic heritability factor? I do have two arches... also elongated whorls- quite dramatic in hands which I have read- were present in mother and daughter/ son... even more surprisingly in the mother's new partner! What is your view on elongated whorls as opposed to more common whorls? This applies too to very upright loops.
Would love input in this area

Felicity
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Re: Heritability of fingerprints

Post  Martijn (admin) on Mon Jul 23, 2012 10:49 am


Hi Felicity,

Yes, I am familiar with the term 'elongated whorl'. Actually, we have a topic about the so-called whorl-variant available here:
http://www.modernhandreadingforum.com/t1838-elongated-whorl


In the FBI perspective of 'the science of fingerprints' this whorl variant is considered as a 'plain whorl' - so, it is considered as just a normal whorl variant.

This can probably best be understood when one considers a true elongated whorl as a variant of the concentric circle whorl. And this implicates that from a scientific point of view the elongated whorl is treated as just one of the many whorl variants.


However, I would like to add that it really depends on the exact shape of this whorl-variant. Because when one can discriminate 2 cores inside the pattern... then it could become more like what Ed Campbell also calls a 'press whorl' (which appears to be synonyms for 'elongated whorl' - which he used in his website article, see figure 20: http://www.edcampbell.com/PalmD-History.htm).

Ed describes the 'press whorl' as a "softer form of the whorl variant". However, I am not sure that this is consistent with what he describes on his website, where he associates the 'elongated whorl' with a combination of the elements water and air. Unfortunately Ed doesn't describe both patterns by detail.


Sorry Felicity, I have no other ideas available beyond that me focus would be on the aspect regarding whether the 'elongated whorls' that you have in mind make a closed-circuit (whorl variant) or whether they can be considered as a a combi-pattern (double loop variant). Maybe this is also what Ed has in mind... but I am not sure.

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Re: Heritability of fingerprints

Post  Felicity Martin on Tue Jul 24, 2012 1:13 am

Thanks Martijn

The Whorl is circular and elongated-

The area that I was interested in was based on your excellent chart in Hand and the sexes where the frequency of occurance for tented arches is about 1% which would lead me to believe it was a recessive trait, and my consequent surprise that it was passed on to both daughters from my husband- which would suggest co-dominance- I had wondered then whether, as they also had inherited blond hair and blue eyes, whether there may be a link to a specific gene which governs those, also normally less dominant traits- I have brown eyes/brown hair. Please?

Felicity
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Re: Heritability of fingerprints

Post  Felicity Martin on Tue Jul 24, 2012 1:16 am

I must admit I don't like Galton's classification system as much as Purkinjie's, where he classifies whorls into three distinct types
Felicity
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Re: Heritability of fingerprints

Post  anand_palm on Tue Jul 24, 2012 4:36 pm

Hi felicity

I guess more than fingerprints being heridetary i would say palmar prints (Interdigital loops) tend to be more genetic oriented. I would not say fingerprints are genetic totally. There are variation where i have seen inconsitencies and consistencies within family. So it cannot be said it is totally inherited. Also sometimes the elongated whorl at centre would give an S type appearance.

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Re: Heritability of fingerprints

Post  Martijn (admin) on Fri Jul 27, 2012 3:53 pm

Felicity Martin wrote:Thanks Martijn

The Whorl is circular and elongated-

The area that I was interested in was based on your excellent chart in Hand and the sexes where the frequency of occurance for tented arches is about 1% which would lead me to believe it was a recessive trait, and my consequent surprise that it was passed on to both daughters from my husband- which would suggest co-dominance- I had wondered then whether, as they also had inherited blond hair and blue eyes, whether there may be a link to a specific gene which governs those, also normally less dominant traits- I have brown eyes/brown hair. Please?

Felicity

Hi Felicity,

Thanks for explaining your thoughts. In general, fingerprints appear to be belong to the category dominant traits. Various studies have pointed this out, however there are reports describing that exceptions are possible, for example this study reports:

"A radial loop on the index finger has been reported to be a sex-linked recessive trait7 although radial loops are normally only slightly less frequent in females than in males"

http://www.nejm.org/doi/pdf/10.1056/NEJM196406112702402


There is no likewise info available for a tented arch. And I have the impression that it doesn't take to have the feature present in both the mother and father, in order to become manifest in the child.

(Though, I should add here that I never really tried to study patterns of inheritance. But I would recommend to study this with a considerable number of cases - and not just by looking at the patterns inside your family)

Anyway, thanks for asking! Thumbs up!


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Re: Heritability of fingerprints

Post  Felicity Martin on Fri Jul 27, 2012 11:08 pm

Hi Martijn,
Yes, I had already for some time started collecting scans of people's hands and asking them to give me the inkprints they do or allow me to scan prints of their children. I am hoping to do a study or report for psychology Honors/ Masters in Psychology in this in a few years.

Lucky to have several medical academics in my hand workshop network including one of the world's leading authorities on treatement and recovery, post trauma/surgury for hand and arms- occupational therapist who sees hundreds of hands and she is now very interested in this area. As she regularlly travels overseas giving workshops I have recommended her following up on the German University courses in dermatoglyphs.

Thanks for the further insights on heritability, I had read a few papers but having done genetics at Uni several decades ago- way back in time of Mendalian counting of wing aberrations in fruit fly! that ages me! was a bit bemused over the tented arch/ arches and how things may or may not have evoled from the evolutionary perspective. I was very interested too in the nationality aspects including observations as to the more hyperflexible nature of some hands in some nations and possible observed correspondences in collectivist v indiviudalistic societies.

The more flexible the hand the more happy they are thinking collectively- working together.

I also have been quite surprised at the rareity of radial loops/tented arches/arches- I have a few, as do my children especially as they originally have been the basis for most hands then through advantageous mutations been superceded, maybe with loops reflecting increased flexibility and adaptability.
After studying the very interesting Lifeprints some time ago I am wondering whether the School of Peace- and their fear is because they, a bit like the earth or primal element they may represent, are psychologically more aware of their mortaility.

Felicity
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