Questions tagged [genetics]

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

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1 answer
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What gene could have a mutation that makes humans have blubber?

In my world, there are three species from the Homo genus that make together a clade named the aquatic humans: Homo maritimus, Homo corpulentus, and Homo gigas (the names respectively mean "marine ...
1 vote
4 answers
390 views

Is it reasonable to assume the near-extinction of women?

The world of Ruquelis has some problems. It is populated by men, women and winged lilim as in this question: How to get the Lilim to breed true?. People on Ruquelis reincarnate according to the ...
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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 ...
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16 votes
16 answers
6k views

Is there a paternity test method given medieval level technology with low false positive rate?

Determining genetic fatherhood is very important in my worldbuilding experiment for lots of reasons, one being succession, but regardless it's the genetic component that's important But it's possible ...
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-1 votes
1 answer
133 views

A genetic disease that is characterised by both gigantism and intellectual disability [closed]

In an Of Mice and Men parody I want to write, Of Rats and Women, there is a 30 years old woman named Léonie Petit (her surname is ironic, because petit is a French adjective that means small/little/...
10 votes
5 answers
1k views

How would a sapient eusocial species avoid inbreeding?

I have a sapient species in my setting called "mole-bears". I based their social system on eusocial species, specifically naked mole-rats. Mole-bears are on average around 100 pounds and ...
-4 votes
1 answer
122 views

A genetic disease that makes humans of any origin have epicanthic folds (slanted eyes) [closed]

I imagined for a future film, a 21 years old human of French nationality and citizenship named Thérèse Arielle Huguette Flavie Alexandre (Alexandre can be both a given name and a surname, in this case,...
1 vote
3 answers
277 views

How possible is it for someone to be born without a sex(physically)?

When I say "sexless", I mean that they are born without male or female phenotypic sex. Not identifying or being nonbinary, but Anatomically sexless. Note: This is not to offend anyone who ...
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12 votes
13 answers
4k views

A subtle war between the sexes

In this question, I detail a world with a third human sex, lilim, who have bat-like wings and taloned feet like a bird's. The TL;DR is that lilim give birth to equal numbers of men, women and lilim (...
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5 votes
4 answers
1k views

Is it plausible for only living animals to be valid candidates for cloning?

So in my seting an alternate universe that's 67 million years "behind" ours, T. rex is on the brink of extinction early, with only 1 member left due to extreme overhunting by universe ...
1 vote
2 answers
84 views

How could an animal grow hair overnight?

I am trying to create scientifically accurate werewolves. Of course, werewolves are not really possible, but I am trying to make mine as believable as possible. How could they quickly grow hair/fur in ...
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1 vote
1 answer
98 views

Heterozygote advantage against pork tapeworm

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 ...
-1 votes
4 answers
157 views

Genetic engineering for "natural selection" in a single individual [closed]

Yes, I KNOW that evolution is a process that occurs through many generations via random mutations and natural selection, but in a world where humans have found a cure for aging and have mind backups ...
2 votes
2 answers
333 views

programing genetic memory (or; the hard way to get your kids to clean their room.)

Is genetic memory in higher life forms real? if so can, in theory, an organism be programed for a specific behavior or set of skills? Ie: if genetic memory is a mechanism that does exist, at what ...
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0 votes
1 answer
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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 ...
0 votes
1 answer
114 views

What would be the differences between our society and one where almost everyone is half-sisters? [closed]

Imagine a medieval society composed entirely of women, with some small number of machines (let's say 7) which can take material from two women and combines it to create an embryo that's implanted in ...
2 votes
2 answers
175 views

Would humans crossbreeding with animal people cause more birth defects? [closed]

I am working on a world inspired by witcher where humans and animal like race live together. would for example, human crossbreeding with water dwelling humanoid cause something like mermaid syndrome? ...
-2 votes
1 answer
126 views

Impact on genetic diversity with 6 person mating groups

Context I know enough about genetics to know I need to ask others. I'm writing an alien humanoid species that revers the number 6 as part of their culture and religion. Their marriage equivalent forms ...
-1 votes
6 answers
250 views

What kind of reproduction methods would allow for an only male animal species to exist?

I was reading that there are certain species of starfish which fission made them in some locations to have a scarcity of female starfish and in other locations there are species which only male ...
5 votes
1 answer
69 views

What changes to a humans physical form would occur if society lived inside the Earth?

(Mandatory I am new here, hello, nice to meet some fellow world builders, sorry for any mistakes, yikkity yak and all that) In my "world", it has been 500 years since the majority of human ...
1 vote
1 answer
152 views

A genetic disease that makes humans have much more brown fat than the average human being

I wonder if the disease I invented is realistic or a total fiction. In my story The Transcendence of Adolescence, there is a 17 years old homosexual (or lesbian if you want) transgender woman named ...
4 votes
2 answers
492 views

A genetic disease that makes humans unable to produce adrenaline

I wonder if the disease I invented is realistic or a total fiction. In a white drama/lighthearted tragedy (the opposite of black comedy/dark humour) web-series for a teen audience in mind I want to ...
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 ...
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-8 votes
1 answer
244 views

Would many parents use In Vitro Gametogenesis and Designer Baby technology to choose to have girls with Complete Androgen insensitivity Syndrome? [closed]

I have been reading about Complete Androgen Insensitivity Syndrome and from what I understood these women have features like being more beautiful and more attractive than the average, lack of periods, ...
6 votes
4 answers
818 views

How does the human body reacts to cells older than its own? [closed]

The question is: If i could replace my arm with the arm of someone older than me, would the fact that the cells in the transplanted arm are older cause any specific reaction? Please handwave all ...
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5 votes
2 answers
88 views

What would a heterozygote advantage against the mutant coronavirus responsible for COVID-19 look like?

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 ...
-1 votes
1 answer
157 views

Harmonizing Lamarckism with Genetics [closed]

Many Science-Fiction worlds, whether or not by design, have their aliens arise by what seems to be a form of Lamarckism. While this is all well and good, these same worlds also make use of a lot of ...
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2 votes
1 answer
160 views

Would many parents use Designer Baby technology to make their children have Asperger Syndrome?

I have Asperger Syndrome and I was thinking if in a future which parents can use Genetic Engineering to choose the characteristics of their offspring many of them would choose their children to have ...
3 votes
2 answers
128 views

Why would a species from the Homo genus have overwhelmingly B negative blood type?

In my story (go to see What evolutionary pressures would lead to Ogres?), there is a massive species from the Homo genus called ogre. They mostly have B negative blood type (I do not mean Rhesus null, ...
-3 votes
2 answers
223 views

Shortest pregnancy length possible using artificial womb technology [closed]

Let's say that genetic engineering can make a baby be born far less than 8 - 9 months and since the artificial womb is a device it would not have the metabolism limitations that a real womb have so ...
1 vote
2 answers
244 views

Genetic Plausibility of All-Male Half Giants and All-Female Witches

So, this problem is kind of a two-in-one; arguably two different issues but very closely related, so I'm posting them as one question. I'm designing a lineup of fantasy races for a roleplaying setting,...
0 votes
3 answers
140 views

What would this character potentially be charged with in this situation? [closed]

In my sci fi short story I'm working on, a company called Generation sometime in the future, develops a viral based treatment for a new kind of cancer that has arisen in young children. Around fifteen ...
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5 votes
2 answers
253 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-...
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6 votes
3 answers
303 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 ...
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-4 votes
1 answer
175 views

Would it be possible to genetically engineer wings onto humans? [closed]

This is entirely hypothetical, but there is human gene editing equipment. It is hypothetical because the wings would not work, unless they were ultra-light and the wingspan was 60 feet.
4 votes
2 answers
131 views

What would a heterozygote advantage against rabies look like?

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 ...
1 vote
4 answers
263 views

How would a human/floral humanoid offspring look?

I’m trying to figure out what the appearance of a human and a floral humanoid offspring would look like. The floral humanoids have humanlike bodies with petal hair and “unnatural” skin color (which ...
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5 votes
1 answer
173 views

How much of a genetic bottleneck would one man siring children in multiple generations be?

After reading Ryan North's How to Invent Everything, I thought it might be fun to try to do my own Connecticut Yankee story for NaNoWriMo, but going back an early Stone Age population. I figure on ...
2 votes
7 answers
145 views

How to ensure magic-sensitive population remain low? [duplicate]

In my world, China earns its beginning to three major clans: the Huang, the Yan, and the Chi You. Huang and Yan are normal homo sapiens, but Chi You is a clan of sentient magical reptiles like dragons ...
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2 votes
1 answer
144 views

Genetic disease that makes thermoregulation voluntary

I wonder if the disease I invented is realistic or a total fiction. There is a real life genetic disease called congenital central hypoventilation syndrome (or Ondine's curse, if you want). People ...
5 votes
3 answers
501 views

A genetic disorder that makes people unable to feel itch

I know that congenital insensitivity to pain exists and is autosomal recessive. There is a village in Sweden where 40 cases of this rare genetic disease were reported. I am writing a story with a ...
5 votes
2 answers
105 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 ...
2 votes
2 answers
192 views

Would digitigrade legs be superior in low gravity for a bipedal organism?

all, I was reading another post on this forum about humans with digitigrade legs, mostly noting that they were relatively inefficient due to constant exertion to remain standing. On a planet with ...
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6 votes
1 answer
212 views

How can an animal get "upgrades" at different stages of its life?

I want an animal that gets harder to kill as it grows older, biologically immortal. Every time the animal passes different stages of its potentially endless life, it can choose to "upgrade" ...
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3 votes
8 answers
320 views

How would a small society of wizard geneticists spread magic powers through a magicless earth best?

A society of wizards has a magical gene they want to spread on an otherwise magicless earth. The magic gene is limited in total potency to any effects that you could produce with a million dollars. ...
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4 votes
4 answers
179 views

Could a genetically modified plant become a house?

I was checking out art made by Hyrotrioskjan on Deviantart and found his Nea project. One art piece features large genetically modified plants that are able to essentially house a community. These ...
2 votes
1 answer
177 views

What would it take to have a 100% redhead population?

Redheaded-ness is a recessive trait. Obviously a society could just kill every baby that comes out with a different hair color, but is there any passive way for a human ethnic group to be 100% ginger?
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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 ...
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1 vote
2 answers
148 views

Re Zero ; kill all and start over - what genes are associated with non violence

Anyone with a perfectionism mania would understand the urge to delete and destroy everything for the smallest mistake, the most insignificant impurities are disgusting and craze inducing from the ...
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2 votes
2 answers
250 views

Making egg laying humans [duplicate]

What are the minimal changes to human biology that a biological engineer can make to create humans that successfully reproduce via egg-laying? Assume that he wants to preserve as much of the ...

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