/sci/ - Science & Math

>>15841959
I am not the same specie as a fucking sub saharan nigger

>>15841959
Brainlet, chromosomes are basically like boxes. It's what is in the boxes that matters.

>>15841959
>>15841964
>>15841968

chromosomes come in pairs
humans have one "fused chromosome"
2x 23 = 46
2x 24 = 48

monkie chromosome 2a and 2b were fused toghether in a freak mutation and thus human was born

THIS MAKES HUMANS genetically incompatible to create monkie babies with chimp and gorilla

>>15841964

>>15841984
What's mindblowing is that the fusion actually only took place on a single chromosome, it's just that single chromosome rose to a high enough frequency in the human population that people with two of those fused chromosomes started to be born, then everybody had a fused chromosome.

>>15841959
Humans share ~98% of our DNA with Chimps. The differences between Humans and the rest of the great apes isn't that big at all. Its just that we had two chromosomes fuse and that small changes can have big ramifications.

>>15842144
That is actually crazy. I wonder how often chromosome fusions/fissions are the cause of speciation?

>>15841984
but there would have been a point in time before the mutation fully spread where the population had both 23 and 24 pairs of chromosomes.

How does science explain how it even spread in the first place if different chromosome numbers supposedly can't reproduce with each other?

>>15842158
how many base pairs of a difference is it?

>>15842503
I would don't know off the top of my head. The 98% figure comes with some caveats because not everything is one to one. For instance some sets of genes got duplicated in humans but entirely removed in chimps, or genes that both in humans and in chimps but are in different chromosomes, and other large mismatches. So its not merely a matter of lining up all base pairs and spotting the difference

>>15842514
>that both
that are both

>>15842465
Species are a fictional construct, but within that fictional construct the relation holds
- if some lineage develops a different number of chromosomes, that lineage always becomes a new species
- the converse is not true, and different chromosome numbers are not needed for new species

>>15842144
doesn't that just make sense though, the predecessor species with the human mutation and his offspring kept breeding due to the success of this gene until a stable and genetically diverse population of proto humans was present. Then over time those proto humans who kept breeding with each other created a new distinct proto human species that couldn't breed with the predecessors species anymore. Eventually 1 gene bearers would be forced to go either way until they all died our, have a child with either species which would land their offspring as protohuman, predecessor or hybrid again till the cycle closes itself.

Are those the N chromosomes?

>>15841984
Not sure about that.

>>15842556
they really do look like apes with chromosome abnormalities

>>15842144
It feels more like the job of a virus present during conception affecting several individuals at the same time, and not just a random mutation making an individual incompatible with the rest of the population.

>>15841984
>humans have one "fused chromosome"
anunnaki did this

>>15842564
People with Robertsonian translocations aren't incompatible with the rest of the population. Most of them can have kids without a problem.

>>15842465
Quite often, it's been observed in donkeys/horses. Chromsomes probably split/fuse all the time. There's not much distinction between two genes on the same chromosome vs two genes on different chromosomes, except that two genes on the same chromosome can enter linkage disequilibrium. I believe that chromosome fusions happen due to changes in selective pressure.

>>15842500
>if different chromosome numbers supposedly can't reproduce with each other?
they can

>>15842514
>>15842503
>>15842158
I'm afraid human is further away from a chimp than 2%
so doesnt share 98%

however most of humans are quite close to each other
I have made comparisons

too bad I had no access to African DNA and these are just different branches of Eurasian people compared to each other and then chimp thrown in the for a good measure

turns out we are seeing that different eurasin peoples are almost all identical and chimp is nearly 20% different

>>15842670
Not sure about that. Most probably they were pure white people, true humans, that fucked their genes by mixing them with semitic niggers, that is goblins, in order to have hybrid slaves to do the hard labor.

>>15842140
i hope youre not the faggot that cried about kurisu not getting in the new sticky