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
1answer
233 views

Society structure/ gender roles where biological sex consists of dominant and recessive alleles [closed]

Similar to this question with some very key differences. In this human civilisation sex 1 (s1, represented by 'X') is a dominant allele and sex 2 (s2, represented by 'x') is recessive. There are ...
9
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7answers
2k 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 ...
5
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3answers
452 views

Mating and Death: Modern Life Disrupted

So, if you haven't looked at my previous question: Would a sentient species be able to thrive when mating means the death of the male partner? Please do, as the information in it directly pertains to ...
4
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4answers
2k 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
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1answer
149 views

The Possibility Life Patents?

Genetic engineering has come a long ways now form it's humble beginnings with Dolly to artificial organs, it's only a matter of time before we are making brand new animals to use for circuses, sports ...
3
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1answer
400 views

Genetically Diverse Slaves

Thousands of years ago, human domesticated wolfs and from this domestication came dogs, one of the most varied species on earth. This occurred through simple genetic manipulation and forced evolution. ...
3
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1answer
203 views

How can we make all people peaceful and thoughtful? [closed]

Could we select peaceful and thoughtful people based on their DNA traits? I know thoughtful can sometimes bring some sort of violence, but if we could select only the fit, peaceful, and thoughtful ...
10
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3answers
394 views

DIY Genehacking: What can I do with it?

Assuming an average, fully developed adult man, what sort of changes could be made to his genome that would have a noticeable effect on his mind or body? To the best of our current scientific ...
2
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0answers
220 views

In a fantasy universe in which magic use is hereditary, what might be the odds of any one person being able to use or cast magic? [closed]

I'm making a small text-based game in a world like that of Dragon Age or Harry Potter, and the fun of it is randomly generating NPC's, and changing behavior their behavior accordingly. Would anyone ...
7
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5answers
490 views

Is the DNA base of the currently living species able to change so much that supports the existence of “fairy tale” humans and animals? [closed]

A theory about One Piece comes to my mind recently: the series contain a lot of impossible, non-existent and "fairy tale"-like elements, such as various giant animals, bizarre cross-species, giant or ...
7
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5answers
744 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 ...
17
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7answers
2k 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 ...
5
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1answer
399 views

Can Bluebeard's Blue Beard be Genetic?

In the original French folktale of Bluebeard, the titular villain was described as just that--having a beard that is blue. No backstory on why blue has ever been given. The most believable, ...
7
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3answers
668 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 ...
6
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3answers
270 views

How much could a species benefit from a single child possessing DNA from multiple fathers?

Imagine we have a multi-cellular 'mammal-like' species which is K-select and usually has only one young at a time. Now imagine that this single young regularly has multiple fathers. Specifically the ...
10
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12answers
2k views

Genetically engineered de-evolution

Why might a species advanced enough to develop genetic engineering start a process by which their own genes, over hundreds of years, would get edited back to resemble their more primitive ancestors? ...
5
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2answers
169 views

Could robust protohumans adapt to high-g worlds better than we might?

Some of our ancestors were more robust than modern humans. Could they adapt to a 2-g world better than we might? Maybe even 3-g? Over time their bodies could evolve, i.e. only the most robust would ...
7
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6answers
802 views

Breeding two species to become genetically more similar?

I was thinking of a scenario in which people decide to use breeding to try to make two species more genetically related to each other. The people take genetic samples of each individual from their ...
-1
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6answers
1k views

Is 1000 years long enough for a major evolution to happen? [duplicate]

Writing a story where people have evolved to harness their brains to have control over different elements depending on personality. Is 1000 years a long enough time for this to plausibly happen? Does ...
2
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2answers
253 views

Using Mythology to Inspire Human Evolution [closed]

This scenario teeters on the verge of B-movie science fiction, but still, let's say that some ambitious scientist, who is an avid fan of mythology, uses that childhood obsession to test genetic ...
2
votes
1answer
281 views

How could Kuutamian animals work?

In Ribbontails Series Aman5 there are creatures called Kuutamian animals. These animals are sapient and can have any form. The creator uses the excuse that they have three DNA strands, but how ...
3
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1answer
982 views

Will changing the DNA change the hair structure/color taking into account the fact that it gets constantly renewed? [closed]

I have read this comment on the website "...changing the DNA will not change the phenotypical effects that were caused by the code! So if you change somebody genes so that his eye colour would have ...
10
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3answers
889 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 ...
3
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2answers
268 views

Mirrored twins that aren't identical?

If a pair of twins developed when their mother's egg split in half and they were fertilized by different sperm, could one of them develop situs inversus? The child with the condition would be male, ...
2
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2answers
165 views

Are there any side effects if genomic imprinting no longer exists?

I'm trying to make a world that human sex ratio is 2:8 (male:female). Most of the females are homosexual, and male is not necessary for reproduction. I thought it was easy at first, just say that ...
3
votes
1answer
125 views

How will a different form of DNA works?

Most species of living organisms have double helix DNA, can there be a tesseract DNA? What benefits does this form of DNA have over the common helix form? Will this form of DNA unique to 5 or higher ...
2
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2answers
362 views

Race relations in the land of human shapeshifters

What happens in regards to race relations when anyone can arbitrarily change their appearance? This is based in a near-future Earth where normal humans the world over have gained the ability to ...
4
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11answers
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, ...
2
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4answers
2k views

What's to stop shapeshifting humans from changing their appearance all the time?

All the excitement surrounding the power to quickly and easily alter one's appearance has largely died down. Social norms have arisen around what kinds of changes are acceptable and which kinds are ...
2
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3answers
189 views

Cloning through mating

All of us have unique DNA, one part of it is from our father the other part is from our mother. Suppose there is a way to allow human being to give birth to a pair of twin whereby the male inherited ...
3
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4answers
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 ...
2
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1answer
474 views

The Fullest Potential of The Human Race

70,000 years ago, Homo sapiens sapiens suffered a genetic bottleneck that reduced the population of likely 100,000 to 3,000. Over seven billion people of several distinctive races are descended from ...
39
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10answers
55k 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 ...
7
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7answers
819 views

Genetically preventing a rebellion on a generation ship

In the year 21--, a crew of 100 sets out from Earth on the good ship Tenzing Norgay, bound for Epsilon Eridani. The journey is estimated to take . . . well, quite some time, given that it was ...
7
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4answers
1k 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 ...
3
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3answers
358 views

What if a person can bear a child that is genetically identical to its parent?

We all know that genetic diversity in our species (homo sapiens) is maintained by sexual reproduction. Man and woman provide each half of genetic information randomly selected from their own to their ...
9
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5answers
4k views

Could someone survive if all the DNA inside his cells got damaged? For how long?

I did some quick research on DNA and I know it can be damaged by different sorts of mutagens. I also know that this kind of damage can lead to cancer. Though I'm not entirely sure of where exactly it ...
13
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4answers
8k 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 ...
7
votes
9answers
917 views

Same species originating from multiple planets?

Like the title states, how would it be possible for the same species to live on multiple planets (before space travel is invented)? Basically, a civilization invents space travel, meets aliens, and ...
9
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11answers
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 ...
11
votes
4answers
571 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 ...
28
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10answers
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 ...
4
votes
1answer
477 views

Will humans ever have 6 fingers on one hand? [closed]

The polydactyly gene is dominant over the common gene for finger number. Will humans ever have six fingers?
13
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8answers
6k 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 ...
5
votes
2answers
410 views

How could an insectoid race survive despite a small gene pool?

Consider an insectoid race where each worker/soldier/role is bred as required by the queen. This is very similar to ants on earth. Periodically new Queens are born who then set out to found their own ...
12
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4answers
5k 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 ...
11
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3answers
646 views

What is the minimum distance needed between physically distinct races?

If there are several races with very distinct appearances (e.g. Nordic-pale vs. Arabic-tan skin, red vs. black hair, etc.), how much space / natural barriers do I need between their homelands to ...