Just because something is genetically recessive doesn’t mean the gene is rare in a population.
O+ is the most common blood type in many countries, including the US.
https://en.wikipedia.org/wiki/Blood_type_distribution_by_country
Comment on A heart-warming story
deltapi@lemmy.world 10 hours agoNo. O is rarest. The chromosome pairs are made of A,B,O. A & B are Dominant, O is recessive.
If I’ve done the math right, there’s 144 ways to combine the genes of parents giving a resulting distribution of
A 33.3%
B 33.3%
AB 22.2%
O 11.1%.
Because AA, AO, OA all result in type A… BB, BO, OB all result in type B… AB and BA both result in type AB… Only OO can produce type O blood.
Shrubbery@piefed.social 9 hours ago
FreshParsnip@lemmy.ca 9 hours ago
I googled and multiple sources say O+ is the most common type at around 37-39% of the population. You are right about how the genes work but if the majority have two alleles, then type O is going to propagate and stay common. It also means a lot of people with type A or B are carriers for the O gene and have children with type O
deltapi@lemmy.world 9 hours ago
Good points well made.