— Why is AB- blood rare? I try looking it up but...

1.5M ratings

277k ratings

See, that’s what the app is perfect for.

Sounds perfect Wahhhh, I don’t wanna

the-environmentalologist

Anonymous asked:

Why is AB- blood rare? I try looking it up but there not much and when there is I can't comprehend it?

the-environmentalologist answered:

So lets start off with the population break down (roughly) for the ABO-Rehsis blood typing (but you can ignore the rehsis typing for this):

O-positive: 37.4 percent
O-negative: 6.6 percent
A-positive: 35.7 percent
A-negative: 6.3 percent
B-positive: 8.5 percent
B-negative: 1.5 percent
AB-positive: 3.4 percent
AB-negative: 0.6 percent

To have AB blood you need an A from one parent and a B from the other parent because there are two genes controlling the ABO typing (O is just having neither an A in the A gene, or an B in the B gene).

So if ~42% of people have an A allele to give, and theres only a 50% chance they will give it. Only 10% of people have a B to give (again only a 50-50 shot). which makes the likelihood of the AB blood type quite slim. Mostly because the likelihood of having a B to give is pretty rare.

In short: AB is rare because not many people have a B to give to the AB genotype.

More you might like

romanceyourdemons

ladyshinga

mariacallous

#'accidentally'

bisexualshakespeare

[ID: Tweet from Leah @grammedevanille reads “RIP Aux Anglophones Parce Que Le Jeu De Mots Avec Ken Est Incroyaaaaable
Quote Reply by @MathildeMerouani reads: French twitter losing its mind because they translated the Barbie poster literally and accidentally made a pun that reads 'She knows how to do everything. he just knows how to f*ck.'

Attached is a Barbie poster showing Barbie sitting on Ken's left shoulder and grinning. She has one hand splayed over his face. Text reads: Margot Robbie, Ryan Gosling. Elle peut tout faire. Lui, c'est juste Ken. Au cinéma le 19 Juillet. /End]

squeeegs

mareepkeeper

New patch just dropped

an image of a black patch with painted details. on the top right is a stylized rendition of Disco Elysium character "The Insulindian Phasmid". to the left and below this character portrait is a pale fog. inside the fog in pink letters reads "you are a violent and irrepressible miracle".

buttercupyarnart

forever70s

70s crochet

mousearmymittenco

I think that the legipillar outfit for babies is a fine idea, but that baby is developmentally way past the legipillar stage and is going to fall over. The baby is going to faceplant. Kid is like 3 years old. Dude. That kid is thinking about getting into a good college. That potato bag design is gonna hold him back

mousearmymittenco

Good take; this is a situation I did not account for, and I reckon that compared to a toddler, most adults are less likely to forget/ignore that their legs are in a sleeping bag and try to take off running.