[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports ] [ become a patron ] [ status ]
2023-11: Warosu is now out of extended maintenance.

/sci/ - Science & Math

View post   
File: 16 KB, 765x627, family tree.png [View same] [iqdb] [saucenao] [google]
9915358 No.9915358 [Reply] [Original]

I have a mother and a father so the number of parents I have is two. My parents also both have a mother and a father so the number of grandparents that I have is four. My grandparents also all had two parents so the number of my grand-grandparents that existed during a certain time period was 8. If we go on with this process, 40 generations ago the amount of my ancestors was 2^40, which is impossible. What exactly is the issue here?

>> No.9915362

inbreeding

>> No.9915431

>>9915358
Fuk this is interesting
>>9915362
To what degree inbreeding is not degenerative?

>> No.9915453

>>9915431
Second or third cousins under regular circumstances. The official Icelandic cousinshagging-prevention app (is.ses.apps.islendingaapp) uses second cousins

>> No.9915457
File: 100 KB, 750x715, 1506828611866.jpg [View same] [iqdb] [saucenao] [google]
9915457

>>9915358
you assume that it just diverges exponentially, but consider that all life has 1 common ancestor, so clearly some of your ancestors will have common ancestors as well, which I guess you could call "inbreeding", tho it may be very distant inbreeding

>> No.9915464

>>9915431
>To what degree inbreeding is not degenerative?
https://en.wikipedia.org/wiki/Population_bottleneck

>> No.9915469
File: 87 KB, 275x266, rusty.png [View same] [iqdb] [saucenao] [google]
9915469

>>9915453
>tfw great great grandparents were first cousins
Am I a goblin?

>> No.9915475

>>9915469
Not necessarily if your other greatgrandparents were 4th cousins or further apart

>> No.9915478

>>9915469
No but probably Semitic.

>> No.9915494
File: 127 KB, 815x623, charles_ii.jpg [View same] [iqdb] [saucenao] [google]
9915494

>>9915469
You are like a little baby. Watch this.

>> No.9915500

>>9915494
I could wank to that.

>> No.9915503

>>9915494
El Hechizado...

>> No.9915505

>>9915494
So fucking a 1st cousin is fine?

>>9915500
Same

>> No.9915508
File: 706 KB, 1681x854, Untitled.jpg [View same] [iqdb] [saucenao] [google]
9915508

>>9915358
Just imagine you're the son at the bottom of this.

>> No.9915524

>>9915508
Am I correct in assuming that the son would inherit 98.4% of all his genetic material from that one guy?

>> No.9916668

>>9915524
Doesn't sound wrong, but where'd he get it from?

>> No.9916806
File: 114 KB, 1080x793, Dbu_N5nW0AE2UOy.jpg [View same] [iqdb] [saucenao] [google]
9916806

>>9915508

>> No.9916828

>>9915508
>Japs

>> No.9917129

>>9915453
Reproduction with your second cousin is more likely to create retarded or deformed babies than with your first cousin, imo try to avoid anyone you know you're loosely related to full stop, you'll probably end up with a 4th or 5th cousin anyway

>> No.9917138

>>9917129
So i should fuck a nigger

>> No.9918761

>>9915358
Retard! You're overlooking incest, polygamy, and deaths.

>> No.9920087

>>9918761
deaths? What does it matter here?

>> No.9920089

This is a +18 board

>> No.9920094

>>9915508
I've heard about this guy. My understanding is that he's some sort of really fucked up immortal minor character that appears in the background of a bunch of otherwise wholesome visual novels that take place in the same universe. Is that right?

>> No.9920101

>>9915505
If you do it two or more generations in a row it starts to go bad. Even one is risky, but not the worst thing you can do.

>> No.9920157
File: 69 KB, 612x570, chad_breeding_theory.jpg [View same] [iqdb] [saucenao] [google]
9920157

>>9915358
>>9915362
>>9915431
>>9915453
>>9915457
>>9915469
>>9915508
>>9915524
>>9917129
>>9917138
>>9918761
>>9920094
>>9920101

>muh incest inbreeding meme

Incorrect.

Normies like to assume, out of cognitive dissonance, that everyone have one mother and one father in the ideal nuclear family scenario.

But really it was just a few chads procreating with multiple women at a time like pic related.

Someone smart enough here on /sci/ should do the math of the impact of 1 man procreating with 17 women over 40 generations. I'm betting top dollar the math checks out at matches the actual measured population.

>> No.9920255
File: 311 KB, 923x1600, 1487881918220.jpg [View same] [iqdb] [saucenao] [google]
9920255

>>9920157
>le desperate incel post
I know you hate women and are really in need of (You)s, but keep your shit together.

scenario Chad:
>1 man procreating with 17 women
scenario Beta:
>17 men procreating with 17 women

now the magic question: in which of these scenarios does the next generation have a bigger gene pool (and therefore less inbreeding)?

>> No.9920258

>>9920157
Take your popsci headline bait back to >>>/pol/.

>> No.9920273
File: 19 KB, 484x472, z.png [View same] [iqdb] [saucenao] [google]
9920273

First cousin marriage in Italy

>yfw

>> No.9920286

>>9915469
My parents are first cousins and I'm 6'4, 190lb, and in graduate school. It's kinda weird but I had no say in the matter. I've just learned to take the inevitable banter from whomever finds out.

>>9915478
Yep.

>> No.9920486

>>9915358
This is a great question. I love questions like this.
You are asking how many ancestors you have and you are computing it by raising 2 to the generational power and you are getting a huge number and you are wondering if you computed it right?

The wrong problem:
#. >>9915464 Population bottleneck is not an issue. Each person still has two parents. The induction would still hold.
#. >>9920157 Multiple wives situation is not an issue for the micro view. The only thing that matters is A PERSON has a father and a mother, not ALL PEOPLE don’t have unique parents. That person still only has one father regardless of how many children or wives that father has. The induction still holds
#. Each person alive today has the same number of ancestors, but all of us don't have unique ancestors so we are not multiplying that 2^40 by each person alive. Just so we are clear. We are just worried about that exponent.

It is also wrong to look at the exponent themselves. This way madness lies.
#. In a geometric expansion the level matters. The past doubles a large number; the present doubles a small number. So for the total, which generation is eliminated by cross-mating matters.
HOWEVER:
#. There is cross generational mating (your grandma is also your mom) and cross-cross generational mating (your great grandma is you mom [less likely]) This matters but only partially reduces a generation in the exponent. The parent still has two parents, etc….
#. There is intergenerational mating (your mom is your aunt) and inter-intergenerational (your second cousin is your mom).This doesn’t matter at all.
To get a full generational reduction, both parents would have to be your grandparents, which is impossible.
SO The Problem is NOT one of INBREEDING.
(CONT)

>> No.9920495

>>9920273
I had a crush on my cousin tbqh

>> No.9920498

>>9915358

your ancestor dad was alpha male that fucked tons of woman, i think they called him Genghis khan

>> No.9920509

>>9920255

you are dumb.

scenario omega:
17 men and 17 woman makes kids but they keep changing partners for maximal mixing, binominal 17 choose 17 = 355687428096000 combinations

>> No.9920510
File: 450 KB, 1024x926, Italy-Per-Capita-GDP-Map-1024x926.png [View same] [iqdb] [saucenao] [google]
9920510

>>9920273
Interesting how more cousin-fucking = lower GDP.

>> No.9920519

>>9920510
Correlation != causation.

>> No.9920532

>>9920519
He's right. Maybe being part of a crappy economy makes you more likely to marry Auntie Grammaw.