two members of a species sometimes produce offspring that are not members of their species?

Bitch-Im-a-cow · 2024-02-02T20:39:09+00:00

[deleted]

bife_de_lomo · 2024-02-02T21:28:53+00:00

To help you conceptualise the process, take a look at ring-species.

Separate populations can viably breed with neighbouring populations because they are similar enough, but because of genetic drift not those a few populations over as they are different enough to make it impossible.

As other posters have said, this takes many generations of small changes, it's not like a chicken/egg thing.

HiddenFox · 2024-02-02T21:18:27+00:00

Are you thinking about this in too large of steps?

It's not like an ape just one day gave birth to a human. It's small steps every few thousand years and a million years later you have something so different it's a completely different species.

The thinking is the last major evolution in humans was lactose tolerance. Starting about 7000 BC but not really becoming mainstream until about 1000 BC. Even today there are still some who can't tolerate milk. So could we say every 5000- 10 000 years there is a major jump?

Not sure if that makes sense, just a though.

Also, on the topic IMO natural elevation has stopped in humans due to technology. If a plague came a long that killed 90% of the population we would most likely develop a medical cure before that 90% die and the survivors repopulate. The next big jump will come though technology like Neuralink.

Canbot · 2024-02-02T21:32:33+00:00

Hybrids only happen between closely related species, so the first and second option are really the same because the hybrid is just like two members of the same species that are very different from one another having an offspring. Like race mixing. What causes a species to turn into two species is not that one couple creates a brand new species through mutation, and that one offspring breeds a whole new species. What actually happens is one species is segregated into more than one group and each group continues to evolve separately and without mixing. So every new mutation is shared among the group but not between groups. Eventually the mutations add up and the different groups become different enough that they are considered different species.

If members of two groups can still produce offspring it is because there simply has not been enough differentiation.

package · 2024-02-02T22:59:38+00:00

Simplified to the extreme for the retard:

Species A are small organisms that can move quickly to catch prey. This is advantageous as food is scarce and predation from larger organisms is a concern. They are very successful and come to inhabit a large area.
One of these areas actually has an abundance of prey and a lack of any other predators. Members of Species A in this area no longer need to run to catch their food, thus moving quickly is no longer a particularly beneficial trait. Nor is being small. Over time, this population of Species A become larger and slower, as offspring with these traits are no longer victims of predation or starvation.
Eventually, members of this new population are on average over five times the size of other members of Species A and are simply physically incapable of mating with them. They are now Species B.

MagicMike · 2024-02-03T00:07:03+00:00

The opposite of inbreeding is outbreeding. This occurs when genes are sufficient to produce a child but the genes have too many mismatches. In fact, doctors advise parents of radically different race to begin hunting for similar donors, like a boon with a Swede. Parents need to find a similar couple in case a kid needs a transplant. It’s better to just have kids with same race parents.

Alienhunter · 2024-02-03T00:56:53+00:00

Speciation like many things in science becomes messy when you start looking for fine distinctions because it is largely a human defined term and isn't always consistently applied. Cross species insemination is quite common when the species aren't very different and fertile offspring is not unheard of in these cases but usually you are talking about something more like different colors of insects which is more akin to racial differences in human than cross species breeding.

Racial differences in humans are not significant enough to cause an issue with fertility but you see racial differentiation based mainly due to physical isolation.

If you say, sent humans to another planet to colonize it, and there wasn't any cross breeding for a very long time, that group of human settlers may eventually speciate into some other distinct human species, but it's a long term populational shift and you won't be able to find any point on the process you can definitely say one individual is the new species but their parents were not.

twolanterns · 2024-02-03T08:13:46+00:00

enough to have it work

remember its over thousands/million of years and many of the organism which may have many offspring

you also can have species drift where the hybrids progress and after generations are no longer compatible with the original population pure breeding

AskSaidIt

MODERATORS