I dont think this is true but my hubby is confused as his 5 other siblings all have the same bloodtype as their father and he doesn't, is there some truth to this? 9 I know I should have payed more attention in H.S Biology class lol)
2006-06-12 09:51:33 · 27 answers · asked by Anonymous in Science & Mathematics ➔ Biology
4 out my 5 sons have their dad's blood type while only one has mine. It really doezsn't matter though......
Wiserangel is nuts. A child HAS to have the blood type of one or the other parent. Can't just have one made up..........
2006-06-12 09:55:29 · answer #1 · answered by Sandra 5 · 0⤊ 4⤋
There are four major blood types: A, B, AB and O, which actually represent protein markers on the surface of redblood cells. "O" is the most common and represents the absence of a protein marker, AB is the least common. A and B are codominant, meaning that if you get an A and a B from each parent, you are AB (you have both the A and B markers). O is recessive. If you get an A from one parent and an O from the other, your blood type is A. (same for B). The reason is because one of your parental chromosomes will still code for that A or B marker, even if the one bearing the O will not. (you are technically "heterozygous" for A or B because you have one O. Homozygous means you have AA, BB or OO).
The child's blood type depends on the genotype of each parent. This is not sex-related, meaning that both parents contribute to the blood type equally. The reason why the "phenotype" (that is, what we see or experience) is not always the same as the genotype is because of the recessive nature of the "O".
It is possible, for example, that if one parent is A and the other is B, the child may end up being "O". Here is how:
Imagine a punnett square:
Mother
A
O
Father
B
O
(AO, for example, means that the mother carries an A on one chromosome and a O on the other- since all humans have two sets of chrmosomes from their parents).
B O
A AB AO
O OB OO
In this scenario, 1/4 offspring are expected to be A (genotype AO) and 1/4 are B (OB); 1/4 are AB and 1/4 OO. Therefore, according to probability 1/2 of the offspring will be a genotype entirely different from either parent.
It is possible for one sibling to be a totally different blood genotype than the others, and you can see for yourself if you work out the probabilities like above.
With 5 siblings, the odds are that at least two share the same genotype, but it is not impossible to have a scenario where one is totally different than the other 5.
Just one additional piece of information. In terms of blood transfusions, O is considered the universal donor and AB the universal acceptor. The reason why O can give to any blood type is because the absence of any protein markers means that the immune system of a person with A/B or AB blood type will not recognize and attack O blood cells. However, the immune system of a person with, say, an A blood type will will attack cells with B or AB markers. (we all have antibodies that recognize the markers, but markers other than our own are considered foreign invaders).
2006-06-12 10:14:50 · answer #2 · answered by bloggerdude2005 5 · 0⤊ 0⤋
No.
There is a good but complicated explanation in the page i mention later. There is a cool table explaining that.
But an example will serve:
My grandpa has A positive.
My grandma has O positivo.
My aunt hast A positive.
My dad has O positive.
And my grandpa is my dad-s dad, because they are identical (except for the age).
Dont worry, thats why they use DNA and not just blood types to test fatherhood.
2006-06-12 09:57:29 · answer #3 · answered by Lavender Pink 3 · 0⤊ 0⤋
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2016-05-03 02:47:22 · answer #4 · answered by ? 3 · 0⤊ 0⤋
No. The blood types are A, B, AB and O. You
would have to know what the blood type of each
parent was to know what types are possible in the
children. Often more than one type is possible
from the same parents.
2006-06-12 09:56:45 · answer #5 · answered by Anonymous · 0⤊ 0⤋
My parents are both O+ and I am A-. Your husband's theory is incorrect. Matter of fact, I have 5 siblings, 2 are A+ and 3 are A-.
2006-06-12 09:55:22 · answer #6 · answered by WiserAngel 6 · 0⤊ 0⤋
the answer is a definite no.
each person has two factors determining their blood type - one from his mother, the other from his father. they can be either A, B or nothing(0). AA is A, A0 is A, BB is B, B0 is B, 00 is O and AB is AB. your mother gives one of her factors (alleles) to you, and the father the other one. each factor has a 50% chance of being transferred. so you can really have lots of possibilities. say your father is A0 and the mother B0, you can be either A0 (=A), AB (=AB), 00 (=O), or B0 (=B).
2006-06-12 10:08:24 · answer #7 · answered by mtz 2 · 0⤊ 0⤋
WiserAngel--your mom had relations with the mailman.
Look at the Genetic Inheritance Patterns matrix on my source and you can see how Parent Alleles make Baby Alleles.
2006-06-12 10:00:41 · answer #8 · answered by elietzen 3 · 0⤊ 0⤋
Blood type is like all other genetics, it is based on the random combining of chromosomes and DNA from the two parents.
2006-06-12 10:31:49 · answer #9 · answered by passion8 2 · 0⤊ 0⤋
No, I'm the mother and my son got my blood type. My other son got a mix of the 2. I'm O- and 1 son is O- and other son is A-
2006-06-12 09:54:16 · answer #10 · answered by bobbysgirl703 4 · 0⤊ 0⤋