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While clones and most other sorts of sci-fi duplicates are identical to the original character and, by definition, the same sex, exceptions do exist. The idea dates at least from Time Enough for Love by Robert Heinlein, where the opposite sex clones become sexual partners of the original; nowadays the trope is more used as a quick way of producing a Distaff Counterpart rather than for titillation. Merely being of the opposite sex of his or her original greatly increases the chance of the clone surviving the denouement and showing up in a future story. This way writers can invoke the First Law of Gender Bending without sacrificing an originally sex character they've grown fond of.
Biologically, this is somewhat plausible for male-to-female cloning, because a male has an X-chromosome that can be doubled to produce a female clone, as in Garrett's poem and Heinlein's novel. (Two X-chromosomes are not even strictly necessary! ...Unless you don't want the clone to have Turner syndrome.) (Or alternatively, the SRY gene, which causes maleness, can be removed from the Y chromosome.) For female-to-male cloning, the Y chromosome would have to either come from another subject, and thus one would not have a pure clone, or be formed from one of the X-chromosomes, which would require absurd amounts of genetic engineering and amount to simple fiat anyway. (Alternatively, the SRY gene can be implanted in one of the X chromosomes to create a sterile clone that appears male.) Another solution would be to use the Y chromosome from the subject's father, as that chromosome passes from father to son relatively unchanged.
If the Opposite Sex Clone retains the memories and personality of the original this is effectively a Gender Bender, at least from the perspective of the clone.
Anime & Manga
- In Magical Girl Lyrical Nanoha StrikerS, Uno of the Numbers Cyborgs was revealed in the Sound Stages to have been created by Jail through cloning, using his own genetic material.
- After accidentally looking into an enchanted mirror, Ranma creates a copy of his female self. She, of course is infatuated with him. In the end he accidentally copies his male self and the two copies fall for each other. In an anime episode, Happosai attempts to split Ranma into male and female forms for his own selfish reasons. However, he misses the fact that, A: Ranma despises him and would never obey him no matter the form, and B: the incense he uses is called Personality Splitter. The result is an Enemy Without situation, as the Clone is a vampiric ghost-like entity that is the living embodiment of Ranma's evil.
- Through the power of cyborg bodies, Sechs in Gunnm Last Order becomes the male (or rather female-to-male transsexual) clone of Gally/Alita.
- Oddly averted by the civilization in Saber Marionette J, which consists entirely of men who reproduce via genetic manipulation and artificial wombs. One might expect them to have technology and know-how to remove the Y chromosome from an embryo and replace it with an X chromosome, but it doesn't work.
- The female Nemu is the clone of the male Mayuri Kurotsuchi in Bleach.
- In the Starship Girl Yamamoto Yohko TV series, Yohko's male clone, Yousuke appears. He turns out to be female and in disguise, but then actually becomes male later.
- Getter Robo Armaggedon has Go, the OSC of Michiru, who is dead.
- In the Hentai Manga Alice's Adventures in Sexland, obviously an erotic retelling of Lewis Carroll's book, there was a furniture maker whose furniture was special because it would spring to life and play with the user. Her "masterpiece" was a mirror, which sprung a magical clone of Alice, because, as the creator says, Who knows best what you like and what you need, if not yourself. Only it wasn't an exact clone. She does state, however, that the mirror would have given a perfect clone if that was what Alice had wanted.
- The trope picture is from the artist Pisipisi (NSFW!), and is of a series of drawings where a perverted Mad Scientist college student clones the girl he's stalking -- but puts his own mind in the clone instead of her's. Of course, then "she" wakes up, realizes that "she" now has a horny pervert expecting "her" to be a personal sex toy for him and his friends, and is less than enthused about the idea. Then she discovers that his male mind has no defense against female erogenous zones... Unfortunately, Pisipisi banned all American visitors to his website years ago due to harrassment, and (possibly due to rumors of "Pisipisi" being the pen name of professional artist Saiwase Okiba) frequently goes months or years without updates.
- Keith Violet of Project ARMS, the one female amongst the many clones of Keith.
- Yu-Gi-Oh!!, it isn't a clone exactly, but the digital copy of Mokuba Kaiba that Seto creates in a video game is Princess Adina. It makes a bit more sense in the Japanese version, where the Big 5 programmed the female Mokuba rather than Seto.
- The Innovators in Mobile Suit Gundam 00. They are all technically genderless but come in pairs; out of the four pairs only one has both members having adopted a persona of the same gender (both male), so each of the other six Innovators has their own opposite sex clone of sorts.
- One of Naruto's techniques involves either transforming into, and occasionally summoning several more, scantily clad female versions of himself. And by "scantily clad", we mean "clothed in convenient smoke".
- Darker Than Black Gemini of the Meteor reveals that Suou is an opposite sex clone that Shion created of himself to pass as his twin sister complete with Fake Memories. The real Suou died when the meteor struck.
- Spider-Woman, in Ultimate Spider-Man. Ultimate Spider-Woman has all of Peter Parker's memories and personality traits. So from her perspective, she was a guy who just happened to wake up with boobs and some body parts missing one day. God, it sucks to be Peter Parker. Just to to add insult to injury, she finally saw Kitty Pryde (who in the Ultimate Marvel continuity was Spidey's girlfriend at one point) after going through a disaster zone, hugged Kitty and... got the stink eye for her trouble.
- X-23 is an Opposite Sex Clone of Wolverine, developed by Dr. Sarah Kinney as a solution to not being able to recreate a Y chromosome from a sample of Wolverine's DNA. She instead buffed up and doubled the X chromosome, making a "genetic double" that's pretty much what Wolverine would be as a girl. As for why her eyes are green and Wolverine's are blue, the simplest explanation (other than Did Not Do the Research, Artistic License or miscommunication) is that Dr. Sarah Kinney, frustrated by the continuous failures, inserted part of her own DNA in the mix, as suggested by the two women looking much alike (and having the same eyes). That would make her "sort of" a clone, but not 100% genetically identical to Logan (much like Cammy, below). There was initially some confusion about Laura's third claws being in her feet, but considering that Daken, Wolverine's son, has the third claw come out of his wrist, there's a chance that this specific mutation is prone to, well, mutation.
- In Neil Gaiman's Interworld, Joseph Harker, after accidentally traveling between dimensions for the first time, realizes that he has been replaced in this dimension by Josephine Harker, an almost-exact female copy of himself.
- The character of Lazarus Long in Robert A. Heinlein's book Time Enough for Love is the world's oldest living human. At the beginning of the book, he is trying to kill himself by avoiding "rejuvenation therapy", and a squad of his descendants rescue him. He makes a deal with them: he will go through rejuvenation therapy if they can unearth one experience he could do that he hadn't done already. Two of his female descendants arrange for Opposite Sex Clones of him to be implanted in them; both are born, and he finds himself raising twin female versions of himself. They end up sleeping with him by the end of the story. Every female character in the story sleeps with him. Even the computer (long story) and his own mother, after he travels back in time. He's a
- In Tad Williams' Otherland series, one of Corrupt Corporate Executive Felix Jongleur's early attempts to make himself immortal involved cloning. The idea was to have a clone of himself implanted in a surrogate mother. Of course, the clone would only be a genetic copy; the child would need a similar upbringing to his own to produce an effective copy. To this end, Jongleur wanted the surrogate mother to be like his own mother. Unfortunately, he couldn't bring himself to unearth her body... so instead, he made an Opposite Sex Clone of himself. That's right: he intended to impregnate an opposite sex version of himself... with himself. Very Squick. Fortunately, the project never went beyond the initial stages because a far more appealing (yet no less unethical) option presented itself, so Jongleur adopted the Opposite Sex Clone for his daughter.
- Not quite the same, but it's stated in various novels in Lois McMaster Bujold's Vorkosigan Saga that opposite-sex clones are possible, and that the corrupt rich people who choose to have their brains transferred into a younger clone sometimes pick this option (with optional plastic surgery beforehand, to make sure it's a pretty clone).
- It's implied in Mirror Dance that some people order clones of themselves chiefly for the purposes of sexual experimentation, although the opposite-sex option isn't brought up at that point. It's also stated outright that he mass produced Durona Group are of both sexes, although there seem to be more females than males. (The original is a woman.)
- In A Civil Campaign, Lady Donna Vorrutyer becomes Lord Dono thanks to a cloned set of male anatomy. The missing Y chromosome was supplied by her dead brother. Ivan gets really squicked by all this because he had previously had an affair with Lady Donna
- In the BattleTech and Mechwarrior series of books The Clans are a race of supermen and women that are mass-produced in batches from the DNA of their greatest warriors. During their childhood all the clones engage in casual sex with each other to build bonds. This sometimes continues into adulthood; notable examples include the Pryde siblings from the novel Legend of the Jade Phoenix and the Hazen siblings from the Mechwarrior: The Dark Age novels; both from Clan Jade Falcon.
- Maeve Wolf, of the Wolf's Dragoons, is secretly a sex-swapped clone of Jaime Wolf.
- The Stardoc series has for a main character Cherijo Grey Veil, who is introduced as the daughter of renowned geneticist Dr. Joseph Grey Veil. Later in the series, we discover not only is she a female clone of the good doctor, she was created as a wife for him. Basically, he was such an egomaniac that he felt only his Distaff Counterpart would be a worthy mate. And he was willing to get laws passed declaring her a non-person in order to make sure she had no say in the matter.
- A later novel revealed that her "father" did not intentionally clone himself as a female. This was done by an ascended being and was a complete surprise to the scientist.
- In House of Suns, by Alastair Reynolds, the various posthuman clone houses, such as Gentian Line, consist of male and female clones of a single individual.
- In James Patrick Kelly's story "Solstice," one of the main characters does this. Later he turns it into Screw Yourself. At least he eventually has a moral epiphany and is filled with guilt, both about the incest and his selfishness in cloning himself.
- Warrior Cats: Does Rowanclaw somehow becoming a she-cat for a few books and then turning back to a tom count? I mean, some people apparantly pair them together (RowanclawxFem!Rowanclaw. No, really.).
- Averted in Maggody And The Moonbeams, where Dahlia (not the sharpest tool in the shed) only thought her son and daughter were "identical twins" (= natural clones) because she didn't know what the term meant.
- In Biting the Sun the heroine goes male, just so s/he can produce sperm which s/he store, then uses (once she switches back to female)to impregnate herself. It doesn't end up that well...
- In Sergey Lukyanenko's Dances On The Snow, a genius geneticist named Edward Garlitski manages to create a female clone of himself named Ada Snezhinskaya. She shares his ambition and a vision of a world where genetic engineering is the norm. However, they have different ideas on how to achieve this goal. He chooses to work within the system by perfecting genetic engineering (in another book he is hailed as the father of genetic engineering). She decides that the entire society needs to be remade through political means. She creates hundreds of clones of herself and Edward and sends them out throughout The Empire to be adopted by unsuspecting parents. She then plots a rebellion, which would result in her ruling with her clones. Her plan fails but Garlitski's succeeds.
- According to The Bible (Book of Genesis) this is more-or-less Eve's origin, as she was made from Adam's rib.
- Well, not quite. Man was made from the dust of the earth according to Genesis, or, at least was made after everything else. Fun how that trope taken literally in this context is so close it hurts.
Live Action TV
- Red Dwarf:
- One episode had Rimmer try to go the pervy route with this when he wound up stranded on an unoccupied planet. He screwed up the cloning, though... several times. Even when he got it "right", the clone still had his (male) face, but by that time he was a prisoner of his own male clones and thus had bigger problems...
Technically, she would be my sister, and therefore unable to take me as her lover. After much soul searching, I reluctantly decided, "What the hell", I just wouldn't tell her.
- Another episode has opposite sex versions of the whole crew, where Rimmer's female double (Alternate Universe rather than cloned) comes on to him in a spectacularly unsubtle way, and where Lister proceeds to sleep with and get pregnant by his female counterpart. Although to be fair to Lister, he is marooned 3 million years into deep space with only a male hologram and a super evolved Cat-Man for company, so his options are quite limited, plus he was very drunk. This episode also featured an obvious joke:
Arlene Rimmer: (To Lister) What could possibly have made you contemplate... making love to yourself?
Arnold Rimmer: Well, why break a habit of a lifetime?
- In Doctor Who, in the episode "The Doctor's Daughter", a female Truly Single Parent-offspring is made of the Doctor, although she is not a clone. The relationship between them is presented as father/daughter throughout, as she was created from splitting his chromosomes then randomly recombing them - like sexual reproduction but him being both parents. The Doctor calls her a "generated anomaly". Donna calls her Jenny and the clone takes it as her own.
- An episode of Sliders has Quinn meet Logan, his Distaff Counterpart. Turns she actually is him--in this universe Quinn was born a girl. She's also an Evil Twin.
- In another episode Quinn is on a talk show and mentions meeting Logan, and of course the host immediately asks if he slept with her. They did kiss, though for his part Quinn was unaware of the connection at the time.
- The Clone Song: words by Isaac Asimov, sung to the tune of Home on the Range:
Clone, clone of my own,
With its Y chromosome changed to X.
And when I'm alone
With my own little clone
We will both think of nothing but sex.
- In Mass Effect 2, Miranda Lawson is genetically engineered using her biological "father's" modified genome to be perfect. Unsurprisingly she has some pretty severe daddy issues resulting from what she perceives as her father's egotistical arrogance.
- In the Street Fighter series, Cammy is a female clone of M. Bison (Vega in Japan, or simply "Dictator" in international discussions). Giving that she has blonde hair and blue eyes, it's likely that her DNA (like the case of X-23, above) is not entirely Bison's, but a mix of more elements (maybe a British "mother").
- Super Robot Wars
- Villeta of Alpha/Original Generation was created is the Opposite Sex Clone of Ingram. She was created because Ingram wants to frees himself from Judecca's shackles, and thus he sent Villeta for guiding Ryuusei & others to KILL! HIMSELF!
- Kazuma Ardygun gets the short end of both the romantic stick (stuck in an crossover with a lot of Ho Yay Mecha Animes) as his only valid options is his underage sister and his data clone Aria Advance. Fans are optimistic, though, about his possible options in future games (namely Ibis and Sleigh).
- The King of Fighters series has Kula Diamond, one of the many clones of Kyo Kusanagi. In addition to the sex flip, Kyo's powers over fire became Kula's powers over ice.
- The series can be inconsistent about "clones", sometimes using the term to describe unrelated people who have just been altered to be like someone else, and not clones in the normal sense. This makes Kula's status as a clone unclear.
- Kula did say in her storyline in KOF 2001 that she was "grown from a petri dish" (at least in the English version, anyway), which would make her fall squarely into this trope.
- However, Kula's bio in Maximum Impact 2 hints that she's a clone in the "genetic manipulation" sense (i.e. a normal girl surgically implanted with Kusanagi DNA, much like K' and Nameless). While the MI series is an Alternate Contuinity, most of the characters' backstories seem to be unchanged, so...
- The series can be inconsistent about "clones", sometimes using the term to describe unrelated people who have just been altered to be like someone else, and not clones in the normal sense. This makes Kula's status as a clone unclear.
- In The Elder Scrolls: Morrowind, Divayth Fyr (a very powerful wizard), made four female clones of himself: Alfe, Beyte, Delte, and Uupse. They're variously described as wives or daughters. Surprisingly this isn't particularly played for Squick...at least in his tower.
- There's enough Squick there already, what with the Corprusarium and all...
- Caulder/Stolos from Advance Wars: Days of Ruin has his 'daughters', Opposite Sex Clones of himself. (No explanation is forthcoming as to why their eyes are of different colours, however.)
- In The Sims 2, a cheat can be used to impregnate a Sim by him/herself. Doing this will produce offspring that is a clone of the parent, but it will always be of the opposite sex.
- In Xenosaga URTV #668, named Citrine is the opposite sex clone of Dimitri Yuriev, as were all of the female variant URTVs.
- By the time of Mega Man Zero, the four Guardians were created from Mega Man X's DNA. One of these Guardians is Fairy Leviathan, obviously female.
- The female version of Alex in Deus Ex Invisible War is a clone of Paul Denton.
- Mordred from Fate/stay night was a male homunculus created using Saber's DNA.
- This ironically happens to Mordred himself in Fate Nuovo Guerra. A mix-up in his summoning caused the Holy Grail to plant him in a copy of Saber's body instead of his own. This case is arguable, as in the Nasuverse, Servants are merely copies of heroic spirits, rather than the real deal, and as such, nearly all Servants summoned in a Grail war are clones, in a sense.
- Maji De Watashi Ni Koi Shinasai has Yoshitsune and Benkei, as per their namesakes, are the female clones of the famous historical figures. Seiso is likely this as well, though it's not yet revealed who she's a clone of.
- El Goonish Shive had protagonist Elliot using an ancient magical artifact to try to undo a Magitek gender bender, inadvertently creating Ellen in the process. She was "born" with a perfect copy of Elliot's memories and personality, but her initial Cloning Blues and subsequent attempts to establish her own identity led to Divergent Character Evolution, so she isn't a simple Distaff Counterpart. More than a few scenes make it clear that the classic sex partner idea seriously squicks both of them. In fact, they keep up a convincing Masquerade of either cousins or long-lost siblings, depending on who you ask. Furthermore, since Ellen was split off by the Dewitchery Diamond, Elliot can be considered Ellen's father and (since this is El Goonish Shive and a Gender Bender was inevitably involved) her mother as well. Unfortunately, all of this (plus Elliot's Chronic Hero Syndrome and Ellen's initial Cloning Blues) causes him to treat her like a little sister, which tends to annoy her no end.
- The community-driven interactive fiction MS Paint Adventures: Problem Sleuth introduces a trio of detectives: Problem Sleuth, Ace Dick, and Pickle Inspector ("pickle" in this context is meant to connote "problem"), who, through spirit quests, are psychically linked with female counterparts of themselves, whom they eventually meet in person and are instantly attracted to. Problem Sleuth gets Hysterical Dame, Pickle Inspector gets Nervous Broad, and Ace Dick, lacking the imagination to think of a female counterpart, simply becomes linked to another male version of himself (albeit one who owns a blonde wig).
- In Dragon Tails, when Norman the squirrel orders a clone of himself, he marked the sex box with an F (for "Fine the way it is") and got a female clone. The clone is also a child, since this was done with genetics.
- They were also really drunk while designing her genetic pattern, so they made her glow-in-the-dark as well.
- The Inexplicable Adventures of Bob: While trying to manipulate Galatea, Riboflavin shapeshifts into his idea of what a male of her species would look like. Unfortunately, she doesn't actually have a species, and her reaction is, "Oh my G...! A sex-swapped version of my own face? I'll have nightmares for a week!" He then disguises himself as a handsome human male, and gets a much more favorable reaction from her.
- Mixed with Evil Counterpart in AH Dot Com the Series: the crew's Mirror Universe doubles (who previously appeared having the same sexes as the primary crew) inadvertently invent a Gender Bender virus and then have to kidnap the primary crew to extract original DNA samples. By the end of the episode in question, they're all cured except Doctor What, who ends up remaining female in subsequent episodes. Given that the counterpart is likely just as big a perv as the original, s/he probably adapted quickly enough. Includes examples of Man, I Feel Like a Woman and lots of Squick.
- In The Guild Bladezz' little sister looks even more like him than you'd expect (the androgynous clothes probably help). This isn't to put her down, if anything it makes Bladezz retro-actively prettier.
- As part of Rule 34 that says everything is Fetish Fuel to someone, Rule 63 says for every male character, someone has made a female version of that character, and vice versa.
- Quoth many an anonymous users; "It's not sex, it's masturbation!"
- The web-toon series Bonus Stage featured a female clone of main character Phil Argus as a gag character, once as a "perfect girlfriend", the next as a "cheap ploy for additional viewership" (applified by bunny ears and fox ears (presumably to appeal to a wider spectrum of viewers).
- A Bleach Fanfiction has the Sonoma (the original universe introduced in Tite Kubo's work) and Kan'na, an alternate dimension, where alternate dimension versions of the Sonoma inhabitants exist. In some cases, they will be reversed gendered versions of the original. In the case of Dyan Arashi from Sonoma, he has a female counterpart in Kan'na under the same name.
- X-23, a female clone of Wolverine, and an eventual Canon Immigrant from X-Men: Evolution to the comics. See the entry under Comic Books for more detail.
- Dani(elle) Phantom in Danny Phantom, a Captain Ersatz of X-23. She and Danny seem to settle on calling each other "cousins."
- Powerpuff Girls: The Rowdyruff Boys, in a twisted-Evil Counterpart way. They aren't so much clones as bargain-basement knockoffs, made when Mojo Jojo imitated the Powerpuffs' creation using more "manly" ingredients. Some fans consider them romantic counterparts to the girls as well.They're not
- Each of Starscream's clones in Transformers Animated represents some facet of his personality, which includes a female one (who refuses to explain what part of his personality she represents).
- Dr. Finklestein from The Nightmare Before Christmas builds a female version of himself out of body parts around his lab. While not a genetic clone, he does give her a half of his brain, so that counts.
- In a Valentines episode of House of Mouse, Ludwig Von Drake deduces that the perfect partner for someone would be an Opposite Sex Clone. The two can't stand each other, and she breaks up with himself.
- The Fairly Odd Parents: Sanjay once dated a female version of Timmy.
- Bionic Six: Dr. Scarab's attempt to create a female companion resulted in this. Later, his Opposite Sex Clone created opposite sex clones of his henchmen.