Is it true that mothers and their first born daughters always have the same blood type?

Question

I don't know my blood type but I know my mom's. So is it safe for me to assume that we have the same type?

Answer 1

NO.
Explanation:
DAD-----MOM----------POSSIBLE CHILDREN
"O"------ -"O"------------------ALL type "O"
"O"----"A" or "B"------50% "O", 50% "A" or "B"
"A"--------"B"-----------25% each "O"; "A"; "B"; "AB"

It is not true that first born daughters always have same type as their mom. Take the 3rd case of probability. If an "A" father married a "B" mother, they can have all blood groups in the family (i.e., A, B, AB, O).

Answer 2

I don't have the same blood type as my mother and I am the first daughter born, I have the same blood type as my father, but my sister who was second born has my mothers blood type. She looks like my mother and I look like my father I think it is pot luck!

Answer 3

no,
i am my mothers first born daughter,
my blood type is o- like my dad's
my mother is o+
but, my brother is o+

Answer 4

No... if to illustrate, one among your mom and father is AB and one is AO, your sister ought to nonetheless be A (AA or AO), yet you ought to be something different than O. often, in case you provide blood (like at achronic), they'll deliver you a card showing you your good blood-variety.

Answer 5

no...it depends on ur father's blood type too.if u learn biology about traits,u'll know..if ur father has blood group o n ur mother have blood group o too,u have big chances in getting bood group o.basically first born child have chances not having the same blood group as their mother or even their father..maybe same blood group as their grandma or even their uncle/aunt...

Answer 6

I don't know if I would assume... After all, my mom is AB positive, while I am B negative.

Answer 7

No.

I am B negative, and my firstborn daughter is O positive, like her father.

Answer 8

nope