Social Distancing Discussion - Bloodtypes

Discussion in 'General Discussion' started by Bcamos, Mar 25, 2020.

  1. Bcamos

    Bcamos Member

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    This math doesn't make any sense to me. I figured this would be a neat discussion to have.

    O blood type is recessive. Meaning if a Mother has O+ blood and the Father has B+ blood, the child will have B+ blood.

    However, O+ is the most common blood type, with 37% of the population having O+.

    How does this happen if O is recessive?

    [​IMG]

    upload_2020-3-25_10-11-10.png

    For example, Green eyes are also a recessive trait, and they only account for 2% of the world's eyes. How does O blood type not match this same pattern?

    upload_2020-3-25_10-14-32.png
     
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  2. Wolfman Zack

    Wolfman Zack Member

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    I’d safely assume that this is due to a homogeneity of O+ Blood type in certain populations and regions.
    If you and your spouse have the same O+ blood type, it will be passed on to any children you have, regardless of if it’s recessive.
    Same reason that certain recessive traits are common in specific populations, a concentration of a trait in a specific population will continue to propitiate it regardless of recessive tendencies.
     
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  3. OKcherokee

    OKcherokee Member

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    I’m not only left handed, but also AB positive.

    On the plus side, I’m a universal recipient and can get blood from any other blood type.


    IIRC type O is a universal donor.


    I didn’t know there was such a thing as red eyes, but I have known someone that had Grey eyes.
     
  4. JollyRoger523

    JollyRoger523 Member

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    Hmm I've never studied blood types, beyond general health class.

    All I know is that I'm A+, my ex is O-, and our boys are a reverse combo. One is A-, the other is O+.
     
  5. erik

    erik Member

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    blood is multiple gene trait.
    there are genes for A, B, and O - each person carries 2 in 6 combinations. (AA, AO, BB, BO, AB, OO)
    There is also a gene that determines RH+ & RH- which complicates the total number of possible blood types.

    type A can be AA or AO
    type B can be BB or BO
    type AB can only be AB
    type O can only be OO
    each parent donates 1 blood type gene
    so 2 type A people can make Type AA, AO, or OO
    2 type B people can make type BB, BO, or OO
    an A and a B can make AO, BO, AB, or OO
    A and AB can make AA, BO, or AB
    B and AB can make AO, BB, or AB
    AB & AB can make AA, BB, or AB
    AB and O make AO or BO
    O & O make O
    RH+ and RH- are why they used to blood type everyone prior to issuing a marriage license, because mixing +/- blood types can endanger both the child and the mother, especially on the second child. Fortunately, there are meds now that help an RH- mother survive carrying an RH+ baby.
     
    Last edited: Mar 25, 2020
  6. OKcherokee

    OKcherokee Member

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    That’s pretty fascinating.
     
  7. Bcamos

    Bcamos Member

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    There we go! That's the interesting information I was looking for. That's really cool.
     
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  8. erik

    erik Member

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    dad's an A
    mom's a B
    elder sib is A
    younger sib is AB
    I'm O

    and we're all left handed (another recessive trait)
     
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