Questions tagged [genetics]

For questions about a way to pass on biological information from one generation to the next.

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3 votes
3 answers
141 views

A Better Genetic Polymer?

This is a long one. (TLDR at the bottom) The prospect of alternative genetic polymers has attracted the interest of people for almost as long as we have known about DNA. Indeed, many alternative ...
3 votes
0 answers
63 views

Pathogenic Hive-Intelligence When Critical Mass is Reached

Could there be a virus or amoeba or protist or bacteria (or fungal but that is over-used in pop culture) that infects humans (and possibly other lifeforms) that by itself is not sentient but as they ...
2 votes
4 answers
134 views

observable consequences of perfect healing

What are the Consequences of Perfect Healing? Or stated another way, what short-to-mid term observable consequences would there be after altering a human being to be in a perfect state of health, ...
15 votes
9 answers
4k views

Will it be possible to prevent cancer by introducing ECC on genome?

Could it be possible to drastically improve DNA repair capabilities by introducing error-correcting codes into the human genome? Would it be feasible to reduce the probability of cancer while slightly ...
3 votes
8 answers
516 views

What is a plausible sex determination system with males, females and multiple hermaphroditic sexes?

EDIT: I unexpectedly had a possible solution to this come to me, and posted it as answer here. Please look it up and give feedback on it. I'm trying to come up with a plausible sex determination ...
16 votes
7 answers
5k views

How should a time traveler be careful if they decide to stay and make a family in the past?

In a world where time travel in the past is possible but deletes the current future/ present, there is a person named Sarah who does not worry about the ripple effects her actions might create. Sarah ...
2 votes
5 answers
1k views

Could gene therapy become the new plastic surgery?

In an EXTREMELY near future (the story is set in June 2028 of the Gregorian calendar), there are some people that use the gene therapy because they want to change their physical appearance. For ...
1 vote
1 answer
191 views

How would sex chromosome inheritance work in a tetraploid trioecious species with the ZW sex determination system?

I imagined a trioecious angiosperm species descended from common cocoa trees (Theobroma cacao). Trioecious = three sexes (male, female, and simultaneous hermaphrodite). They use the ZW sex-...
7 votes
2 answers
1k views

Effects of radioactivity several generations after exposure

Imagine this scenario: A big nuclear disaster occurs and local population is exposed to a big amount of radiations. Of course, many die, but those who survive emigrate away from the radioactive area, ...
7 votes
5 answers
900 views

Is there a reason that females passing on more than 1/2 of their genetics to the child would be unlikely to evolve?

On the earth today most animals use a two sex mating system where male and female provide the same amount of genetics to the resulting offspring, despite the fact that in many cases the female ...
9 votes
2 answers
2k views

Genetic Compatibility Amongst Differing "Fantasy" Races

Okay, it's a staple amongst certain fantasy settings where you have different races of creatures and beings co-habiting, which leads to certain off-shoots of different races (the half-elf and half-orc ...
12 votes
9 answers
8k views

In a world with time travel, would it be possible to be your own mother's mother?

Given that you can travel back in time and have a baby there, or alternatively, send your baby back in time, would it be possible that this baby one day becomes your own mother (gives birth to you)? ...
7 votes
9 answers
3k views

How long would it take an isolated population to develop into its own ethnicity?

Okay, so I had this idea that there is a group of refugees (a majority of them civilian families) taking cover from an invading force, vanishing into a mountainous region that serves as a natural ...
2 votes
3 answers
270 views

Would a genetically-inserted “memory” be present in all neurons? Or just specific neurons?

So a hypothetical concept I’ve been playing with lately involves the “RNA memory transfer/storage” hypothesis, recently notably demonstrated in slugs a few years back which made a few headlines. The ...
1 vote
3 answers
184 views

How much would mtDNA testing help to track down matrilineal descendants of a 2000-year old immortal person?

I'm writing a story which is intended to be mostly realistic and historically accurate, but with one character who is biologically immortal. She is born in a Pictish/Caeldonian/Celtic village in ...
0 votes
0 answers
60 views

What's the minimum amount of people required to create a growing population? [duplicate]

I'd like to know how many people it would take to begin a genetically stable civilization. I don't need/don't care about the infrastructure aspect, only the genetics. Scenario-wise let's assume there ...
2 votes
1 answer
281 views

Can 'prions' help me avoid a genetic engineering temporal paradox?

On the world of Ruquelis, the horrific practise of cannibalism stands on three legs, however, this question is concerned only with Leg #1: Genetics. In How to have 'easy' sexual morphs in ...
0 votes
3 answers
151 views

How large of an initial population would it take for these new traits to average out into the standard population of the world?

Let's say, many years ago, hybrids between humans and other mammalians were created and introduced into the world for various purposes. They have the same cognitive abilities as the other humans, and ...
4 votes
3 answers
248 views

How to have 'easy' sexual morphs in individuals with two identical sex chromosomes in species with XY or ZW sex determination?

Humans and many mammals have an XY sex determination system. This means that the presence of a Y chromosome makes an individual male, while having 2 X chomosomes (and lacking a Y chomosome) makes an ...
7 votes
6 answers
736 views

What are some specific body parts that would irreversibly fail over time in a cancer-immune, biologically immortal person?

Let's say that you have a person who's, if certainly not immortal in the general sense, biologically immortal, as enumerated in this question - not only do their telomeres never shorten, they're also-...
9 votes
9 answers
5k views

Is there an Evolutionary advantage for 10% of my mammalian species from the Homo genus to have Von Willebrand blood-clotting disease?

In my world, there is a species of human called Homo hematophagus (blood eating human). Traditionally, these vampires are a cannibalistic race: In war they often drank the blood from their rivals' ...
0 votes
1 answer
113 views

Can an ability enhancer be passed down to your children?

If a person with an ability gains an ability enhancer and has children with their own abilities, would those children be more powerful/ have more range than a child born before their parent gained the ...
3 votes
3 answers
386 views

How fast could a single person introduce gene to human gene pool?

Okay so, in my superhero setting, the way humanity gets superpowers is due to a single mutation. People rarely had superpowers before due to the Dragon gene, but it was always a recessive trait and ...
18 votes
5 answers
2k views

Would a trait that's genetics have "circular dominance" be plausible?

Okay, so based on some quick research, there don't appear to be any real-life cases in genetics of "circular dominance" where, for example, allele A is dominant to allele B, B is dominant to ...
1 vote
4 answers
211 views

Could this hypothetical molecule “read” gene code, to allow universal epigenetics?

Here’s the idea: I want to create a biological info-storing material, probably much like RNA, that—like noncoding RNA does—is able to mediate and enact epigenetic changes to the genetic code/material ...
2 votes
5 answers
2k views

Biology of hermaphrodite species

How from a evolutionary standpoint hermaphrodite species can exist and have a good genetic diversity, with no self-impregnation? But, this race visually looks more like females, they do have breasts ...
3 votes
5 answers
630 views

Could a species with multiple types of genetic material, like a “universal donor”, reasonably naturally exist?

As of late I’ve been developing a concept for a species able to transmit traits through genetic information, basically putting that information into a “host” organism to enact some sort of epigenetic ...
2 votes
3 answers
151 views

Can migration be planted into an animal's instincts by humans

So animals will migrate for many different reasons and I wondered if humans could take a species (example:rabbits) that doesn't migrate, and somehow make it develop a yearly migration pattern without ...
5 votes
6 answers
969 views

How long will it take for a "mutation" to pass to all the human population?

(Note: I am not yet sure about the population numbers involved here, but if it is a very crucial aspect of the answer, somewhere between 1 million to 100 million at the start is almost certainly ...
1 vote
3 answers
114 views

How can I determine gene expression in cases of multiple co-dominant genes? [closed]

On a planet far, far away, there exists a human species with many appearances and abilities. There is a form of energy that flows through air, water, earth and plants (but not humans or animals) which ...
3 votes
2 answers
159 views

How would I go about establishing phenotype in the case of co-dominance where mixed phenotype is not an option? [closed]

I am trying to work out genetics for a race that has three types of healers. Having any healing ability is dependent on having the healer gene. What type of healer you are is determined by a ...
8 votes
5 answers
1k views

What percentage of the population has the "magic gene"?

So I have a world that has magic. Whether you can use magic is hereditary, and there's about a 1/4 chance of inheriting the "magic gene". What I want to know is, will the percentage of magic users ...
4 votes
5 answers
2k views

Would there be any side-effects of modded humans breeding with vanilla humans

Context I plan on creating a world with two human populations, one that would have their respiratory and blood systems genetically modified (suited to be more resillient against oxygen poisoning ...
4 votes
2 answers
630 views

Transgenic Peach DNA Splicing

It is possible to put a tiny amount of Human DNA in a plant: https://www.smithsonianmag.com/science-nature/the-story-of-how-an-artist-created-a-genetic-hybrid-of-himself-and-a-petunia-25148544/ https:/...
13 votes
7 answers
4k views

What genetic enhancements would maximise “luck” in humans? [closed]

In this Sci-if project of mine, bioengineering is now a highly advanced science, nay an art form, and humans are able to enhance their biology using injections of nanomachines which alter their genes. ...
10 votes
8 answers
3k views

Would humans on disparate planets with little to no contact with one another continue to evolve along different lines?

Would humans on disparate planets with little to no contact with one another continue to evolve along different lines? In this universe, humans left Earth a hundred thousand years before. Or if it ...
5 votes
5 answers
731 views

Genetics of a human-animal hybrid

It’s the age of genetic engineering, and Scientists, in league with shady corporations, have created a group of human-animal hybrids, hereafter referred to as Metamorphs. Metamorphs are designed as ...
18 votes
14 answers
3k views

Are artificial genes discernible from natural ones?

In a sci-fi project, bioengineering is now a fashionable and profitable industry. A couple of bioengineers decide to play silly buggers with the exobiologists downstairs by cobbling together an ...
7 votes
3 answers
328 views

Alt. Biochemistry - Which of these is a suitable alternative/mirror to DNA?

This question is tied to the “Glass Trees” question I asked earlier which everyone seemed to like. Since y’all had such good opinions on that, I figured I’d bring this particular quandary to y’all in ...
-1 votes
3 answers
1k views

How many generations could a small group go without suffering the effects of inbreeding

With a group of twelve human couples stranded on a island, how many generations could they go before becoming infertile due to inbreeding?
3 votes
6 answers
519 views

Is it possible to breed extremely peaceful humans?

There is a dictatrix (female dictator) who is a well-intentioned extremist. She wants to make humans as peaceful as capybaras by only permitting humans who are empaths/sympaths to reproduce, humans ...
8 votes
5 answers
2k views

Would a brain transplant suffer immunorejection if the new body was cloned from the original?

So, having rejected mind uploading in their quest for immortality, the people of my worldbuilding project now seek to develop brain transplanting. The main problem is immunorejection; if you simply ...
2 votes
3 answers
521 views

What would the technical problems be of mass genetic editing? Keidran Animal-Human Hybrids

The Setting I hear you, I'll make this brief. It's been almost 30 years since the Aurea slow cargo ship arrived at Ilus. When they launched the Aurea, almost a century ago, they had the technology to ...
3 votes
2 answers
404 views

How could a species have two sex-determination systems?

I imagined a tetraploid species of teleost. This species has both XY and ZW sex-determination systems. I call this strange thing the VYW sex-determination system. Genetic females have three V ...
2 votes
2 answers
173 views

In a righty-dominated society, how can authorities prevent a right-handed child from being born to two lefty parents?

In this society, superstitions regarding right- and left-handed people are accepted as fact. (I'm going to be politically incorrect and call them "righties" and "lefties" ...
-4 votes
4 answers
882 views

Is complete melanism possible in humans?

One of my characters has a genetic disease called "Complete Melanism". Her eyes, her skin, her hair, and her internal organs are all black. Like a famous Indonesian breed of chicken. The ...
7 votes
5 answers
4k views

How would I evolve horns on humans?

How would I change the evolution of humans to result in horns on humans as a result of reproductive fitness, instead of social fitness. Meaning, NEITHER "Horns are sexy", or some strange infection. ...
2 votes
2 answers
329 views

How could a human develop magenta irises?

I'm writing a character and they have bright magenta Irises. How could I explain the reason why they have that feature?
0 votes
1 answer
319 views

A genetic disease that makes genetically and biologically male humans unable to grow facial hair (the opposite of hirsutism)

In a live-action musical film I want to direct, Le Président et Moi (which means "The President and I") (I want the film to have French as its original language), there is a character named ...
1 vote
2 answers
273 views

Does it make biological sense for primates to come in every possible hair, skin, and eye color? [closed]

There are a lot of Japanese shows and games where people have many different hair colors and eye colors. There are even cartoons and games where people come in every skin color in the rainbow and ...

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