Questions tagged [genetics]

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

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43 votes
10 answers
67k views

How many people are required for a healthy re-population of the Earth (Post-Apocalypse)?

In my particular Earth, much has remained after the human-killing virus, and nature is thriving - even taking over the cities. It's beautiful. But I have separated the healthy populace in orbit ...
Mikey's user avatar
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28 votes
10 answers
2k views

How can I make a net beneficial genetic trait occur only in a small fraction of the population, sustained?

For a species I am working on, there is a specific genetic trait that I want to introduce into the population. The exact nature of either is not important for the purposes of this question, but the ...
user's user avatar
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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. ...
Malady's user avatar
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44 votes
13 answers
15k views

Could humanity survive if all except a few males died in a plague?

Tomorrow, a sudden airborne plague comes around that kills nearly all human males - women are unaffected. The UN and different nations try their hardest but fail to find a cure. There are riots and ...
Grollo's user avatar
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19 votes
7 answers
4k views

Alternatives to DNA

I am in the process of creating my universe, and have based it on semi-hard science. The universe that I have created is quite extensive, and I thought that it would be unreasonable for the only kind ...
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17 votes
10 answers
3k views

Why would life on a different planet use DNA?

Life on Earth pretty early on settled on deoxyribonucleic acid organized in chains of base pairs as the means to code for the construction of proteins which make up a lifeform. It also has the benefit ...
user's user avatar
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13 votes
10 answers
2k views

Variable Intelligence Among Dragons

In the land of Dracoriri, there are dragons. There weren't always dragons, once humans were the dominant species, but then magic-an unexplained phenomenon-invaded earth alongside creatures from ...
Alendyias's user avatar
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9 votes
4 answers
805 views

Little Green EARTH Men?

This question is based on the articles saying that the Mongoloid body plan was all due to an individual mutation from 35,000 years ago. In science fiction, humanoid aliens that aren't of the human ...
JohnWDailey's user avatar
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13 votes
4 answers
808 views

What is the technical feasibility of DNA-altering drinks in a fictional bar?

I am interested of a fictional future world where people can walk into a bar, order a drink with the flavors they want, and as that drink flows through their system, their DNA is modified. An example ...
user avatar
13 votes
4 answers
6k views

What are the effects of having too small a gene pool?

This question discusses the various steps a very small gene pool could take to avoid inbreeding however most of the answers agree that it's very unlikely that a group of 6 individuals could avoid all ...
Liath's user avatar
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0 votes
2 answers
249 views

A friend has an idea for a PA colony traveling to Proxima Centauri B but need help fleshing it out

So, my friend had an idea for a weird Post Apocalypse society traveling through space towards Proxima Centauri B, and she's trying to figure out where the population would be 50 and 100 years after ...
Master Zoen's user avatar
19 votes
24 answers
4k views

How to limit the proportion of a Force sensitive population?

I'm making a world where small part of population are like Star Wars Force sensitives. They have high status in my world, as the sensitivity gives them certain advantages over ordinary people. A ...
Saren's user avatar
  • 617
16 votes
14 answers
7k views

Could you populate a hospitable planet with only a vial of DNA?

In my world, the characters have to travel to a new planet and start all over again. Say they make the journey in a space ship transporting a bunch of human DNA samples. If this ship crashed on the ...
Matthew Goulart's user avatar
14 votes
4 answers
10k views

Improving human reaction time

In this question, we were provided a look at what would happen if a human-like species was capable of moving faster than the speed of sound. The consequences of such a modification seem rather ...
Frostfyre's user avatar
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11 votes
3 answers
1k views

Karyotypes of partially interbreeding human races

In a non-magical world where homo sapiens has evolved into several races or breeds (like dogs) or even species as in Q10102 and Q12190, that can interbreed for the most part, how can one model the ...
Crissov's user avatar
  • 2,838
9 votes
11 answers
4k views

How would a child of a human and alien inherit abilities?

Imagine a child of mixed race, one parent is human and one is an alien who has some ability humans do not have, for the sake of argument telepathy. I'm assuming there is some advanced medical ...
Liath's user avatar
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8 votes
8 answers
2k views

How to get the Lilim to breed true?

On my worlds of Earth, Ruquelis and Ersutiabu, there are three sexes relevant to this question, Men (XY male), Women (XX female) and Lilim (LX female), where X, Y and L are sex chromosomes. Lilim ...
Monty Wild's user avatar
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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 ...
Ambiguity12's user avatar
7 votes
3 answers
4k views

How small can a population be with regard to genetic diversity?

I'm working on creating a species that favours small families for a number of reasons, and have no interest in 'breeding as much as possible'. As a consequence, their population size is small. But how ...
Century's user avatar
  • 911
7 votes
2 answers
1k views

The Multi-Purpose Horse: Stage I: Icelandic x Yakutian

I am in pursuit of, as the title says, a multi-purpose horse, a single breed that can do all the things that the others were only specialized for: travel, labor, companionship, war, speed, strength. ...
JohnWDailey's user avatar
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6 votes
3 answers
541 views

Near-biological immortality and cancer immunity via repurposing telomeres

TL;DR: I have solved aging and cancer with the power of handwaving and genetic science. All rejoice. Yes, there is a question at the end of this all, but you have to read it for it to make sense. In ...
KEY_ABRADE's user avatar
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4 votes
1 answer
546 views

What's the fastest a genetically or technologically enhanced human could regenerate?

After watching this brilliant video by Shoddycast about Stimpaks in the Fallout universe: https://m.youtube.com/watch?v=CLY-FMxsb2U I started to wonder. Just how many of science fiction's most ...
Z.Schroeder's user avatar
  • 11.3k
4 votes
4 answers
1k views

How long will it take to restore genetic diversity if it is reduced drastically in a human population?

I read in this question that the minimum viable population without causing large problems in genetic diversity is about 50. If we have a larger population (say a hundred) and genetic diversity becomes ...
Jax's user avatar
  • 11.9k
3 votes
3 answers
704 views

How long would it take for inbreeding issues to arise for a family that practiced inbreeding?

The magic in my setting arises from inbreeding. However to gain the powers a person must be in-bred. How long would it take before such problems arise from inbreeding if the people continued this ...
user83234's user avatar
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 ...
Sam Kitsune's user avatar
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1 vote
2 answers
561 views

Can genetic modifications become hereditary? [closed]

Could genetic modifications become hereditary over time? If so could they evolve over time similar to regular genes? For example making carbon fibre bones for whatever reason would they eventually ...
user93310's user avatar
  • 311
0 votes
4 answers
328 views

How small can I make this character without making it too weird?

I'm creating a character who was born after a long period of genetic instability, which created a lot more diversity throughout the human race. I'm planning on making my character excessively small ...
Popplio Lover's user avatar
31 votes
16 answers
7k views

Is there a precedent for inventing a new technology many years before anyone else?

History shows that most inventors of groundbreaking new technologies, for example, the light bulb or the telephone were not actually the first to invent this technology and that there were actually ...
Josh's user avatar
  • 429
29 votes
7 answers
8k views

How would "Amazon" (a female only subspecies) genetics work?

The traditional Amazon tribe in mythology is a society of only women that reproduces by capturing outside men. Suppose that the Amazons were an actual sub-population/subspecies of humans that, as the ...
Celibate Hetaerism's user avatar
21 votes
11 answers
6k views

How could cats evolve toxic claws?

This cat looks like a normal Maine Coon to the unsuspecting victim. Except for one little detail: Red claws that inject a neurotoxin into the victim onpon scratching it. What would be the most ...
Secespitus's user avatar
  • 17.7k
18 votes
3 answers
3k views

Humanoid Race with Surpressed Myostatin Gene - Appearance?

I'm thinking about using this as a sort of meta explanation for how Orcs (and possibly other things as well) are different than humans (in muscularity), but I'm not entirely sure what the result of ...
JustSnilloc's user avatar
  • 2,779
13 votes
4 answers
3k views

Who owns genes? [closed]

I'm building a world where humans reproduce by machine, not by sex. Two or more individuals submit their DNA together to a breeding company. This company has pods that take multiple people's DNA, ...
shieldgenerator7's user avatar
13 votes
8 answers
7k views

Real life explanation of inheritance of werewolves' curse

Let us imagine later medieval society, very close to our 15 century society. This society struggled with Great Plague. The legends say, that they signed a pact with some supernatural forces, and the ...
vodolaz095's user avatar
  • 5,815
13 votes
15 answers
6k views

How can the wealthy prevent the illegal propagation of their genetic code?

The human genome has been completely mastered and understood by the end of this century, which has led to a service industry revolving around genetic codes. Gene editing to prevent diseases are now ...
Incognito's user avatar
  • 38.5k
10 votes
3 answers
553 views

Is it plausible to make human gametes from different parent chromosomes?

I'm creating a near future world where laboratories could create human gametes (sperm & ova) using chromosomes from different people. So theoretically we could take 1st chromosome from a 1st ...
DoubleHelix's user avatar
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 ...
Len's user avatar
  • 4,933
9 votes
7 answers
5k views

Would a black population whiten over generations because of living underground?

This questions came to me after some discussion on my previous one about a civilization living under Antarctica. I somehow have the feeling this is a dumb question - sorry if it is -, however I can't ...
user avatar
9 votes
4 answers
2k views

Could cats sustain themselves in caves?

An odd question, yes, but a question I am asking anyway. I have a group of feral cats that lives in a cave system. They've lived down here for generations, and survival of the fittest weeded out the ...
Jay's user avatar
  • 1,063
8 votes
3 answers
938 views

Realism of Sub-humanity over half-humanity

A common feature in fantasy are half-human creatures such as centaurs, satyrs and merpeople. As much as the worldbuilding community wants these to be real, the evolution and anatomy don't match. The ...
TrEs-2b's user avatar
  • 56.2k
8 votes
4 answers
2k views

How much genetic variation between a human and an alien would allow the human and alien to have, even infertile, offspring?

Background: Human Origins: We originated from a space-faring civilization. A breakaway faction that hates advanced space level tech traveled here and set up shop before destroying their advanced tech. ...
Jax's user avatar
  • 11.9k
6 votes
3 answers
801 views

Are genetically engineered wyverns with my specifications possible?

In my post-apocalyptic iron age world meant to be a sci fi twist on fantasy tropes, wyvern like creatures simply known as fliers were said to have been originally created by a crazy billionaire as a ...
Nuclearwalrusnetwork's user avatar
5 votes
11 answers
1k views

Society of Kind, Handsome Geniuses = Dystopia?

Say we have a rich, rich society, where due to scientific advances, a generous socialist-bent government willing to tax the rich at 75% and patriotic citizens mysteriously willing to pay said taxes, ...
Serban Tanasa's user avatar
5 votes
2 answers
120 views

Heterozygote advantage against influenza/flu

Some heterozygote advantages in humans are: People with sickle-cell trait are resistant to malaria, but people with sickle-cell disease tend to die young. Depending of the source we believe, people ...
mammifereviolet4694's user avatar
5 votes
2 answers
265 views

Fine-tuning human genetic-level transformation

Suppose humans discovered a beautiful new world they wanted to inhabit, far from the political machinations and military affairs of the alien-populated universe. They established a few colonies on the ...
Frostfyre's user avatar
  • 25.2k
4 votes
3 answers
252 views

Sandalphon: A Machine that Copied Gametes

Obligatory Premise In the year 2201, Diego OfeAde has been in control of Mars for 50 years. He has moved mankind into Valles Marineris and his aggressive population expansion program has seen the ...
user avatar
4 votes
5 answers
706 views

How could humans re-populate a new planet without conventional procreation

This question is a spin-off of this question In my world humanity is faced with extinction and must devise a way to escape their barren planet. So say they take a space ship to the new planet and ...
Matthew Goulart's user avatar
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 ...
Monty Wild's user avatar
  • 60.3k
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 ...
mammifereviolet4694's user avatar
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 ...
Solitaire's user avatar
3 votes
2 answers
657 views

Highest possible percentage of genetic diversity within a species?

Human genetic diversity between any two randomly selected individuals is estimated at below 0.5%. The most genetically diverse eukaryote known is C. brenneri(roundworms): 14.1% difference between two ...
Anonymous's user avatar
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