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/sci/ - Science & Math


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3129518 No.3129518 [Reply] [Original]

Hi /sci/
I was wondering how genetically related me and my sister are. We have the same father, but different mothers, but our mothers are full blooded sisters of each other, so I think this makes us like three quarters blood related, but i'm not sure.
Should I say we are sisters or half-sisters?
pic unrelated.

>> No.3129535

Anywhere from 50-100%

>> No.3129533

well, siblings only (on average) share half their genes, unless identical twins.

totally different mothers would share a quarter

mothers who were sisters would be 3/8, which is 3/4 of a standard sibling

>> No.3129537

0%-33% same genes

>> No.3129542

>>3129535
Surely we cant be 100% genetically related. We would look like clones of each other.

>> No.3129546

>>3129537
WTF? I thought /sci/ would know stuff like this. I know we are definitely at least 50%, because we have the same father, so 50% of our genes comes from him.

>> No.3129549

>>3129546
you could each have a different 50% of his 100%

>> No.3129586

75%. 50% from the father. 25% from grandparents.

>> No.3129592

>>3129586
half those numbers and you would be correct like >>3129533

because of what this anon says>>3129549

>> No.3129595

>>3129586
Ok, thats what I thought.
so should I say we are sisters or half sisters, because technically we are more related than half sisters are.

>> No.3129597

>>3129546

>That kid who never does his homework
>Rages because people don't help him
>IQ less than 80
>Thinks with emotions
>>>/soc/

>> No.3129604

>>3129595
>>3129595
except he's wrong

you are 3/4 sisters, but share 3/8 of your "blood"

your question was ambiguous basically

>> No.3129608

>>3129597
What? This isn't homework, and I have never done an IQ test.

>> No.3129615

37.5% identical DNA by descent


25% - father
12.5% - sibling mothers (same parents)

>> No.3129616

>>3129518
you're correct, three quarter sisters.

>> No.3129618
File: 8 KB, 253x222, 20061129morbo.gif [View same] [iqdb] [saucenao] [google]
3129618

THE PARENTS ARE NOT INBRED

THERE IS NO SIMILARITY BY DESCENT ABOVE 50% IN DIPLOID SPECIES WITHOUT INBREEDING

MEIOSIS DOES NOT WORK THAT WAY

GOOD NIGHT

>> No.3129631

>>3129618
relatedness is genetic similarity multiplied by 2.
so 100% sisters are 50% genetically related.
OP is 37.5% genetically related to her 'sister' so is 75% sisters.

>> No.3129640

>>3129631
OP has a penis

>> No.3129654

>EK pretending to know what the fuck she's talking about
Aw, cute.

>> No.3129663

>>3129537
This person is correct, then gets flamed.
Fucking, learn some genetics before you flame him.

>> No.3129664

Your father had children by two different women who were sisters.

Fucking hillbillies.

>> No.3129667

>>3129654
i'm not pretending. anything biology related is at least slightly related to my field.

>> No.3129668

you can't just give *a* percent
it's meiosis
there is randomness
this person is probably correct >>3129537

I won't count it because I'm a lazy fuck.
EK get the fuck out

>> No.3129670

So OP, are you debating with yourself whether you should masturbate with your sister's panties by sniffing them, but you don't want to do it if she is practically the genetic identical of you?

>do it anyway, its all about the pheromones, not who produces it
>or if you're really kinky, it's all about the pheromones AND who produces it

>> No.3129672

>>3129667
>anything biology related
Except the male reproductive system, right?

>> No.3129675

>>3129664
We arent hillbillies, and what's wrong with that?

>> No.3129678
File: 2 KB, 126x95, ohu.jpg [View same] [iqdb] [saucenao] [google]
3129678

>>3129672

>> No.3129686

>>3129537
33%? How did you work that out?
>>3129670
WTF. no. disgusting.

>> No.3129691

>>3129686
its not 33%, he's full retard.
25% from your dad, and 12.5% because your mothers are sisters.
so its 37.5%, not 33.

>> No.3129697

>>3129667
What is your field?

>> No.3129700

>>3129697
Zoology.

>> No.3129715

>>3129700
Extensive experience with bestiality does not make one a zoologist.

themoreyouknow.png

>> No.3129718

>>3129715
yeh, but studying zoology makes one a zoologist, and so i am.

>> No.3129719

its impossible to tell how related you are because of random allignment of chromosomes during meiosis as well as crossing over.

anyone who tells you any figure will be lying it is impossible to give you a figure because it is relying on chance.

anyone who tells you otherwise will not have done anything passed highschool bio.

source: I study molecular genetics

>> No.3129720

>>3129719
>anyone who tells you otherwise will not have done anything passed highschool bio.
>>3129631

>> No.3129721

>>3129719
it is implicit that we are talking probabilistically here, that is the 3/8 is mean shared genetic material

if you don't see that u r aspie

>> No.3129723

>>3129664
Whatever. Any guy who has had a gf with a decent-looking sister has thought about fucking her. I once had a gf that had 5 sisters (lolmormons). Granted I would've needed rolls of duct tape for their mouths, but physically I would've gladly boned all of them but the 1 fat one. Any guy who denies it is lying.

>> No.3129724
File: 132 KB, 686x686, Thisiscorrect.jpg [View same] [iqdb] [saucenao] [google]
3129724

>>3129721

>> No.3129726
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3129726

>>3129723
>Granted I would've needed rolls of duct tape for their mouths

>> No.3129732

>>3129723

you could have fucked all of them without any quarrel amongst themselves if they were mormon.

>> No.3129733

>>3129726
You've obviously never been around mormons before. If you had, you would understand.

>> No.3129736

>>3129733
hmm? they chat even more shit than the average religious person?

>> No.3129737

>>3129733

nothing earplugs wouldnt solve.

>> No.3129741

>>3129721
>>3129721
still doesnt take into account non probabilistic crossing over. it also does not take into account mitochondrial DNA and father inherited Y chromosome you guys are all full of BS thinking you know shit about genetics but just writing down a random number because you can divide and add fractions. I may be an aspie but atleast I am not retarded.

>> No.3129742

>>3129736
It's way more religiously focused chatting. If they talked about anything else, it wouldn't have been so bad.

>>3129732
lol. They weren't into polygamy. And my gf got all butthurt at the thought of a 3-some with one of them. No more moralfags for me, thank you.

>> No.3129745

>>3129737
Where's the satisfaction in that?

>> No.3129747

>>3129745

the sweet satisfaction of silence while 5 mormon women preach the word.