geek
Registered Member
New Theory Suggests People with RH-Negative Blood Type Have DNA Not From Earth
http://seizepositivity.com/rh-negative-blood-type-dna-not-earth/
New theory proposed by whom? The stories say "scientists" but those scientists aren't identified. The references aren't to the biological literature.
If RH negative people's DNA isn't from Earth, why are they so similar to other humans? Wouldn't a separate evolutionary origin have resulted in there being countless differences?
Why would DNA be the information storage medium in the first place? RNA viruses show that RNA works, and current speculations are that RNA may have been the original genetic material. There may be other functionally similar possibilities we don't see here on Earth and haven't even imagined.
Why are they eukaryotes with cell membranes, nuclei, chromosomes, mitochondria and all the rest? Why are their chromosomes so similar, with all the histone proteins, centromeres and telomeres?
My layman's understanding of the RH system is that RH antigens seem to be proteins associated with cell membranes, with ion channels in particular. So why is there so much similarity in cell membrane molecular biology, apart from a slight difference in this one protein, if some of us have alien origins?
Why is our cell metabolism the same? Microorganisms (and photosynthetic plants) show us that a plethora of possible pathways exist, so why do humans all use the same aerobic and anaerobic respiration where anaerobic glycolysis and Kreb's cycle cranks out ATPs?
Why do we share the same kind of ribosomes that other eukaryotes have? (Bacteria and archaea have different ones, as do mitochondria and chloroplasts.) Wouldn't space aliens have really different ones, assuming they had ribosomes at all?
Why do our fertilized eggs develop the same way, in the same order, into complete organisms? Why is there so much similarity between fetal development of all humans and other multicellular eukaryotes? (Neural folds, gill slits and so on.)
The whole idea of space aliens with different biological origins even being reproductively compatible with Earth humans is kind of ridiculous as far as I'm concerned. And given all the similarities that human beings share with each other and with the rest of Earth life, especially down there on the cellular level, tells me that all of us have the same initial origins. Even if the first prokaryotic cells arrived on Earth from somewhere else through some kind of panspermia, I'm convinced that once here, Earth life all shares the same evolutionary history.
Someone just confused something about the blood types of "illegal aliens".
I believe different societies might have some different property ,say like the Nepalese their system is different than the people on the low land.
^^^New theory proposed by whom? The stories say "scientists" but those scientists aren't identified. The references aren't to the biological literature.
If RH negative people's DNA isn't from Earth, why are they so similar to other humans? Wouldn't a separate evolutionary origin have resulted in there being countless differences?
Why would DNA be the information storage medium in the first place? RNA viruses show that RNA works, and current speculations are that RNA may have been the original genetic material. There may be other functionally similar possibilities we don't see here on Earth and haven't even imagined.
Why are they eukaryotes with cell membranes, nuclei, chromosomes, mitochondria and all the rest? Why are their chromosomes so similar, with all the histone proteins, centromeres and telomeres?
My layman's understanding of the RH system is that RH antigens seem to be proteins associated with cell membranes, with ion channels in particular. So why is there so much similarity in cell membrane molecular biology, apart from a slight difference in this one protein, if some of us have alien origins?
Why is our cell metabolism the same? Microorganisms (and photosynthetic plants) show us that a plethora of possible pathways exist, so why do humans all use the same aerobic and anaerobic respiration where anaerobic glycolysis and Kreb's cycle cranks out ATPs?
Why do we share the same kind of ribosomes that other eukaryotes have? (Bacteria and archaea have different ones, as do mitochondria and chloroplasts.) Wouldn't space aliens have really different ones, assuming they had ribosomes at all?
Why do our fertilized eggs develop the same way, in the same order, into complete organisms? Why is there so much similarity between fetal development of all humans and other multicellular eukaryotes? (Neural folds, gill slits and so on.)
The whole idea of space aliens with different biological origins even being reproductively compatible with Earth humans is kind of ridiculous as far as I'm concerned. And given all the similarities that human beings share with each other and with the rest of Earth life, especially down there on the cellular level, tells me that all of us have the same initial origins. Even if the first prokaryotic cells arrived on Earth from somewhere else through some kind of panspermia, I'm convinced that once here, Earth life all shares the same evolutionary history.
^^^
So far, we have studied life on only 1 planet. We do not know how similar or different life is elsewhere is. It is ridiculous to assume it is very similar & just as ridiculous to assume it is very different. We have no way to know.
It's not ridiculous to assume it will be very different.It is ridiculous to assume it is very similar & just as ridiculous to assume it is very different. We have no way to know.
This kind of thing does happen to some degree. Both different physical conditioning in different environments, and even some different alleles. Perhaps the most famous cases are the alleles for lactase persistence and sickle cell anemia, but I think there's even some genetic variant actually related to adaptation of environments with lower oxygen, even though this is something organisms adapt non-genetically to some degree, through conditioning.
http://ucsdnews.ucsd.edu/pressrelea...hiopians_heart_healthy_despite_high_altitudes
https://en.wikipedia.org/wiki/High-altitude_adaptation_in_humans