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Only 0.2% Different

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15 feature instances
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Only 0.2% Different	comment	Advertisement:propertag.cmd.push(function() { proper_display('tvtropes_mobile_ad_1'); })Here's normal human DNA, and here's the DNA of the monsters we're fighting. My God! it's only 0.2% different! Despite the fact that the monsters have unexplainable powers, and look, act, and think almost nothing like us, there's no real difference between us and them! Really makes you think who the real monsters are, doesn't it? A subtrope/sister trope of What Measure Is a Non-Human?. There are a few problems with this: Humans aren't their DNA, so even if the DNA is very similar to that of some other being, it doesn't always tell a lot about what that being is actually like. Among humans with very similar DNA types, the variation is huge, and humans are not even a genetically diverse species compared with the norm among animals. Even twins with identical DNA can turn out very different if some environmental input in the womb or after birth changes one of them, like an accident or brain trauma. The seemingly small difference in percentage could still be referring to a huge number of genes of varying importance (or even all of them, as in theory 0.2% could mean every gene is different by 0.2%, making its resulting peptide very different chemically). Between the gene and the human there are millions of complex connections, causal chains, and effects that make even one small difference in genes potentially magnify at larger levels (as in some genetic disorders). The most often used examples, humans and chimpanzees, are astonishingly different in many respects despite the DNA similarity, making it a little awkward. Advertisement:propertag.cmd.push(function() { proper_display('tvtropes_mobile_ad_2'); })In Real Life, it is true that we share some portion of our genome with many other species. Hell, humans have specific genes that are pretty much the exact same as plants. According to most scientific theories, this is because all organisms are descended from the same progenitor organism species, which also used DNA, the global genetic code. Some experts theorize that the first species may have used RNA, which was later used to code for DNA. The genes that were present in that original organism are still around, since they generally serve very important purposes in controlling different aspects of development, but those aspects that they control have been changed and co-opted into other pathways over time. So genes that function to pattern flower growth in some plants (determining which parts of a bud turn into petals, stamens, etc) are necessary for directing heart development in humans. Advertisement:propertag.cmd.push(function() { proper_display('tvtropes_mobile_ad_3'); })Further, DNA codes for chemicals, specifically proteins. Given that, and given that there are only so many ways to, say, break down a fat molecule into energy, it's hardly surprising that two wildly different animals, such as a mosquito and an elephant, would have large quantities of DNA (or rather, code for various chemicals needed for life) in common. Keep in mind that when people who know something about genetics talk about differences or similarities within the same species, they may be ignoring the large percentage of genetic material they would by definition already have in common by being the same species. Examples:
Only 0.2% Different	fetched	2021-01-09T19:07:30Z
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Only 0.2% Different	processingComment	Dropped link to PlayingWithSyringes: Not an Item - FEATURE
Only 0.2% Different	processingComment	Dropped link to Retcon: Not an Item - FEATURE
Only 0.2% Different	processingComment	Dropped link to StarWars: Not an Item - CAT
Only 0.2% Different	isPartOf	DBTropes
Only 0.2% Different / int_2275c659	type	Only 0.2% Different
Only 0.2% Different / int_2275c659	comment	Referenced on House:
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Only 0.2% Different / int_2abfa1cb	type	Only 0.2% Different
Only 0.2% Different / int_2abfa1cb	comment	The Catians in Cat Planet Cuties reveal that the genetic difference between their race and humans is not even as large as 0.2%. There's only about a 0.00001% (One One-Hundred-Thousandth) genetic difference between the two species, and this plays a plot point later on.
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Only 0.2% Different / int_3c65a1d1	type	Only 0.2% Different
Only 0.2% Different / int_3c65a1d1	comment	The Abh from Crest of the Stars. Enemy propaganda says they are living robots. Their own propaganda says they are a superior race of living art. In reality, other than blue hair, Unusual Ears and a different organ in place of their sinuses, they're still human. Despite this the Abh themselves are far more advanced than the humans from Earth though and are quite arrogant about throwing their technology around in fight where they have overwhelming technological advantages.
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Only 0.2% Different / int_43a9c333	type	Only 0.2% Different
Only 0.2% Different / int_43a9c333	comment	Cowboy Bebop has the episode Gateway Shuffle, in which an Eco-terrorist by the name of "Twinkle" Maria Murdock develops a retrovirus that transforms humans into apes. It's explained that there's only a 0.2% difference between human and monkey DNA, and the virus is designed to act specifically on the 0.2%. In a forced example of Honor Before Reason, the crew of the Bebop find themselves having to save the Europa government from being annihilated by a missile containing the virus at the expense of losing their bounty. The reasoning being that they can't collect the bounty if the ones who issued it in the first place are apes themselves.
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Only 0.2% Different / int_44fe781e	type	Only 0.2% Different
Only 0.2% Different / int_44fe781e	comment	The Angels in Neon Genesis Evangelion, who despite being a species of bizarre, physics-bending monsters, some of which look 'very' different from humans, share 99.89% of their DNA with humans (although is complicated a bit by the fact that the Angels are humans. Maybe.) Though the reasoning for this is a bit sketchy. According to Ritsuko, the Angels are made of Hard Light, and she found a strange sequence of Hard Light in the Angel's tissues, which for some reason she decided to compare to the human genome and came up with this trope.
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Only 0.2% Different / int_467c89f7	comment	The Zentraedi from Super Dimension Fortress Macross and Robotech, justified at least in the former case in that they and humans have a common ancestor (the Protoculture). In fact, humans in the Macross franchise have strong genetic similarities to most known sapient species in the Milky Way, thanks to Protoculture bio-engineering.
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Only 0.2% Different / int_69085a0	type	Only 0.2% Different
Only 0.2% Different / int_69085a0	comment	In fact, humans in the Macross franchise have strong genetic similarities to most known sapient species in the Milky Way, thanks to Protoculture bio-engineering.
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Only 0.2% Different / int_760aead0	type	Only 0.2% Different
Only 0.2% Different / int_760aead0	comment	Inverted on The Event. The people from the Inostranka crash have 2% different DNA from humans, and the president interprets this fact to mean that they're just like humans. His adviser informs him that they have less in common with humans than apes do (despite them looking exactly like us and eventually turning out to be our ancestors). This is used to argue that they don't deserve human rights, an idea which the president doesn't approve of.
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Only 0.2% Different / int_7668653a	type	Only 0.2% Different
Only 0.2% Different / int_7668653a	comment	In a rare non-human example of this trope, Mass Effect 2 has, during the Collector ship mission, the discovery that the Collectors you've been fighting are actually mutant Protheans, fair enough. Then you realize that the statues of Protheans you see in Mass Effect look absolutely nothing like Collectors, for one thing, Protheans look as if they're mammals, while Collectors are, as said before, Insectoid Aliens. However, in Mass Effect 3 DLC, you meet a Prothean, who looks a lot more like the Collectors, and it's implied that the aliens depicted in Mass Effect 1 weren't Protheans, but rather the precursors to the Protheans, called the Inusannon.
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Only 0.2% Different / int_9ac9d448	type	Only 0.2% Different
Only 0.2% Different / int_9ac9d448	comment	Ultimate Spider-Man has a rather inaccurate inverted example when Spidey encounters the new Scorpion... who looks just like him. He brings Scorpion to the Fantastic Four, and Reed finds that Scorpion's DNA is 94% similar to Spidey's. For comparison, that's how much humans and chimpanzees have in common DNA-wise. (Although he might be ignoring homo sapiens standard DNA, and only counting DNA that could be expected to vary from individual to individual.)
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Only 0.2% Different / int_b369b223	type	Only 0.2% Different
Only 0.2% Different / int_b369b223	comment	The Doom movie has an additional chromosome that caused people to become demons.
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Only 0.2% Different / int_e4cc7185	type	Only 0.2% Different
Only 0.2% Different / int_e4cc7185	comment	The androids from Armitage III are ranked according to the order they were created. "Firsts" are non-human robots, "Seconds" are androids, and the "Thirds" are so close to human they can get pregnant. And yes, they can reproduce with a human. The "Fourth" were modeled after plants and are arguable improved versions of natural plant life (such as trees that are capable of moving around).
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Only 0.2% Different / int_e863cc41	type	Only 0.2% Different
Only 0.2% Different / int_e863cc41	comment	Lan and MegaMan have a 0.1% difference in their DNA, due to MegaMan being a program designed after Lan's dead twin brother, Hub. However, this is changed to a 0% difference between the two at the end of the first game, making the two have exactly the same DNA. This is all despite MegaMan being a computer program.
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Only 0.2% Different / int_f481d3e4	type	Only 0.2% Different
Only 0.2% Different / int_f481d3e4	comment	In Prometheus, it is revealed that the Engineers are a 100% match for human DNA, despite being ten-foot tall hairless albinos. Considering that we know very little about their environmental development, this is probably one of the most plausible bits of "science" in the entire film.
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Only 0.2% Different / int_f65f0362	type	Only 0.2% Different
Only 0.2% Different / int_f65f0362	comment	Mission to Mars has a puzzle in the face on Mars involving human DNA. This movie has several DNA failures. In that scene, a character says, "That DNA looks human!" while looking at a few base pairs. Out of a few billion. Another scene in the movie has a character displaying his "dream woman" who, apparently, consists of only a few base pairs again. In this scene it was pretty obvious that Phil was just cracking wise when asked what the short segment in front of him represented. The scene was to set up the idea that Phil was very well-versed in biology so he would be believable when he identified the passcode gene.
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