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Originally posted by halfmask
Dog tags say I am o rh neg. Another thing of note about my blood is that I seem to have what at the military they classified as "abnormally" low blood pressure.
Originally posted by shells4u
Originally posted by halfmask
Dog tags say I am o rh neg. Another thing of note about my blood is that I seem to have what at the military they classified as "abnormally" low blood pressure. An incident of note was when my squadron was getting vaccines (5 at once), I was the only one who fainted, which I found odd because I never fainted from needles or vaccines before. No one else in my family knows their blood type, but both my sister and brother have issues with headaches and nose bleeds (I don't).
That has only happened to me one time...It was just a blood test...everything started loseing all color slowly fading to white...but the nurse snapped me out of it and I did not faint all the way...it was such a weird feeling...did you actually faint completely? Did the other guys give you slack over that???
The oldest blood type is A, then AB and B then O, it is feasible that the evolution of these types involved variations in mutations within those types that somehow a group bred out the Rh+ then interspersed amongst the wider population. As an example of the stories on the Rh registry website, one theory is that is occurred because of inbreeding in a small population in Europe.
FACT:All human ABO blood types existed as of several million years ago. From the time of the earliest humans, all ABO types existed as hunter-gatherers until the advent of agriculture. The earliest possible date for agricultural practices is 10000 BC (beginning of the Holocene era), from current research. Through core samplings of ice and the ocean it has been shown that the climate could not have supported agriculture earlier than this date. The climate was too variable during the last ice age, with dramatic changes in as short a time period as a decade, there was a scarcity of free water for irrigation, and atmospheric CO2 levels were very low.
Interestingly enough, the A blood type appears to be the original and oldest human type, not O. This information has been available from microbiological research and analysis of DNA since 1990. The first blood type diet book, "Eat Right 4 Your Type", published in 1996, did not make use of current research, but instead used earlier works to establish its anthropological premise that O's should be on a meat-based diet as they were the original hunter-gatherers. In any case, since all ABO types existed and lived on the hunter-gatherer diet much earlier than the development of agriculture, there is no supportable evidence to have certain groups as vegetarian and others as meat-eaters based on emergence of ABO type.
The difference between having the gene for type A blood or type B blood is a variation of a mere seven letters out of the total of 1,062 that make up the entire gene. We even know exactly where they differ: letters number 523, 700, 793 and 800. If you are type A blood, you have C,G,C,G in these locations, whereas if you are type B blood you have G,A,A,C there instead. These are called 'point mutations' because they are a simple one-letter misspelling in a gene, unless as in the case of blood type it is a consistent variation, in which case it is called a polymorphism.
The type O gene mutation is even more interesting. It is a 'frame shift mutation'; if you are type O you may be surprised to discover that rather than having a difference of letters, like A and B, type O is missing one letter, number 258, entirely.'