reproduction - Could an all-male society exist?

I'd like to create a sci-fi story with a country or planet where only men are allowed to live and they use in vitro gametogenesis and ectogenesis (artificial womb) to have children without any woman.If new reproductive technologies like in vitro gametogenesis (IVG) and artificial womb s(ectogenesis) become possible and accessible in the future, single men or/and gay male couples could reproduce alone without any women involved. Men could make eggs and sperm with their stem cells through in vitro gametogenesis and the fetus could grow in an arti...Read more

Terminology for reproduction via co-opting other species' gametes/embryos

Consider a hypothetical species -- lets call them Exian for ease of reference -- that, besides the "normal" manner of reproduction (i.e. a male and female Exian produce gametes that fuse into a zygote), can reproduce in any of the following modes:An Exian infects a genetically and biochemically compatible non-Exian with a virus that rewrites their gametes' genomes to produce a part-Exian hybrid.An Exian acquires gametes from a genetically and biochemically compatible non-Exian -- whether by natural insemination, extracting the gametes directly ...Read more

reproduction - How to keep Species "Pure-Bred"

I am thinking about having multiple races in my story but I also want them to have relationship (Love/Mating). For the moment lets go with generic types, Humans, Elfs, Dwarfs and Orcs. How could these species remain as they are without them mixing to the point where they are just one species?FYI - Each species can mate with each other and have their own offspring with little to no troubleJust to let people know who read this, all of the answers in this post could have been accepted however the one that was accepted was just a better fit to the ...Read more

reproduction - 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 colonies.We've discussed what happens when a starting population's gene pool is too small. However on earth colonies using this model clearly exist and thrive.In a civilisation where every "minion" in a colony is bred from the queen (and presumably her own offspring) how does a colony survive past it's first few generations and avoid suffering from...Read more

reproduction - Humanoids with breath weaponry -- how would it impact their mating rites?

So, one of the races in my headcanon is a race of draconic humanoids (dragonkin/dragonborn, basically). One of their salient features is that the species develops the ability to spit a pyrophoric, oily "venom" from a young age and retains it throughout life -- this effectively is a short-range breath weapon of sorts, capable of inflicting painful if not crippling wounds or even killing its victims outright if the wounds are not promptly tended to. It evolved from the ability to spit ordinary venom as a defensive weapon against predators that ...Read more

reproduction - How to determine whose child is which?

So, on the planet Qualis, the sole dominant sapient species, the Qualians, a reptilian species, has a problem. Their species are oviparous, and their eggs need heat and protection. Qualian mothers often send their eggs to a “hatchery” where they are kept in a tank with heat lamps over them until they grow. Once they are all hatched, the hatchlings are sent back to their homes. But there is one problem. Since they are kept in a large communal tank, it would be hard to tell which babies go to which family. Even if they labeled the eggs, it wouldn...Read more

Animal reproduction when resources are scarce

(This question is aimed at animals that take care of their young, e.g. dolphins.)As I understand it, most animals reproduce if possible. The only way they don't is because they run out of resources. I'm wondering how this shows up in practice:Do they simply not have sex? If so, does this mean they don't have sex drive?Do they conceive and then let their children starve to death?Do they fail to conceive (that is, are there biological changes to a mother who's not getting enough food such that she is no longer fertile)?Option #2 seems the least l...Read more

Why is sexual reproduction so much more common than asexual (in macroscopic organisms)? Fundamentally, what makes it better?

I'm experimenting with an evolutionary method of creating a neural network. I use an asexual approach, but I've seen others use sexual approaches. So I'm interesting in learning what's better about sexual reproduction as apposed to asexual, and biology is probably the best way to approach that question. So, why is sexual reproduction so much more common than asexual (in macroscopic organisms)? Fundamentally, what makes it better?I'm struggling to understand what the combination of two gene sets does that couldn't be achieved by mutations to a c...Read more

human genetics - Variations in asexual reproduction

It has always been said that sexual reproduction produces offsprings which are superior to their parents, due to the variations which they acquire causing them to survive better in their environment. That's because we can think of meiosis occurring at some level of their life cycle resulting in the variations in the final offspring. But what when we talk about bisexual organisms, might they be plants, animals or any other life form? Can't there be variations in their offsprings if they produce them asexually? It's like when they undergo gamete ...Read more