2006-10-27 09:47:11 · 15 answers · asked by trishscotth 1 in Pregnancy & Parenting ➔ Other - Pregnancy & Parenting
Yes.
We have two Alleles(genes) for blood type. One from mom, one from dad. To have blood type A, it would have to be AO, OA, or AA. Blood type B has BO, OB or BB. Blood type O is OO.
So, a person who has blood type A and is AO, may contribute the O portion to their kid, as can the other parent.
2006-10-27 09:52:48 · answer #1 · answered by Mika M 3 · 4⤊ 0⤋
Hello, I am a mad scientist and I know the answer. The people who say this can't happen are ignorant of biology. You have two versions of every gene in your body, one from Mom and one from Dad. A blood type gene can be A, B, or O. A is one type of chemical on the surface of a blood cell, B is another. O is the absence of a working gene for cell surface markers. So, a person with one type A gene from mom and a type O gene from dad will have type A. Mom's A takes up the slack for dad's lack of a gene, resulting in the same blood type.
Suppose both parents are really A with a hidden O gene (heterozygous, in sciencespesk). Their genetic makeup can be written as AO + AO. The results can be either AA, AO, or OO. Assuming both parents are AO, an OO (usually written as just plain O) child will be born about a quarter of the time. If one parent is a homozygous A (A from mom and A from dad, or AA), then the combinations would be AA and AO, and barring a fantastically unlikely mutation that disables the A in the AO child, will never produce a child with type O blood.
The positive is a mark denotes Rh factor, and is a separate gene. Seeing as both parents carried at least one copy, no cause for concern about parentage.
Short answer: Yes, this is possible and anyone who says otherwise should either explain or go back to freshman biology.
2006-10-27 10:15:19 · answer #2 · answered by Acraz 2 · 1⤊ 0⤋
Yes, you can. If both of the O+ child's parents had one parent each who had an O blood type, the child could end up with and O blood type as well.
2006-10-27 09:52:25 · answer #3 · answered by pattypuff76 5 · 0⤊ 0⤋
The gene for type O is recessive. A parent with type A blood could have either one gene for A and one for O, or two A genes. For two A parents to have an O child, they would each have to have a recessive O gene.
In that case, 25% of their children would be expected to be type O (each having received an O gene from both parents.) The other 75% of their children would be expected to have type A blood (25% would inherit two A genes and the remaining 50% would inherit one A and one O.)
2006-10-27 10:19:06 · answer #4 · answered by mockingbird 7 · 0⤊ 0⤋
Yes, because blood types can either be AA or AO, in which the O is recessive.
And with two parents who are As, it could be AO + AO, and the recessive blood type will show up on one of the children, with the statistics being 1 out of 4 children.
2006-10-27 09:50:37 · answer #5 · answered by These Fights 2 · 5⤊ 0⤋
Yes. O is a reccessive rh and it can be carried by both parents and result in an O rh child. However, they only have a 25% chance of an O rh child (one in 4).
2006-10-27 10:10:10 · answer #6 · answered by Anonymous · 0⤊ 0⤋
No, if the child has a different blood type than both parents something is off. My husband and I are different, but our kids either have one or the other. It's not genetically possible since your blood and the father's blood are mapped out in the gene's.
2006-10-27 09:50:48 · answer #7 · answered by justwondering 5 · 0⤊ 5⤋
1
2016-12-20 13:57:43 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Yes, both my parents are type O and I am A+
2006-10-27 09:56:45 · answer #9 · answered by miamac49616 4 · 0⤊ 2⤋
Yes, they can. They could both have AO blood, rather than AA blood.
2006-10-27 09:50:50 · answer #10 · answered by Stacy 4 · 3⤊ 0⤋