2007-03-15 16:30:41 · 8 answers · asked by countrygrl278 6 in Science & Mathematics ➔ Biology
my mother is B+ and I thought maybe he got the B+ from her and the A from the father
2007-03-15 16:39:56 · update #1
Okay, normally that is not possible. Type A or B alleles can't 'skip' generations because they are codominat and *almost* always expressed. So if your mom had type B, and you are type O, that means you simply didn't get her B allele, and thus can't pass it to your child.
There is a very rare exception to that. To express A or B type proteins, you actually need two genes. One gets you a precursor protein called H. Then, a second protein is the A or B type enzyme. So if you have H and the enzyme for A, you convert H into A and thus express A. However, if you have the A enzyme allele, but a rare recessive version of H (hh), then you won't express the A protein since there wasn't an H protein to be converted. With me?
Okay, so then you say the parents are O and A, and the baby is AB? Well, the O type parent might have actually had the B allele for the enzyme, but a recessive h trait. Thus, they were phenotypically type O. The child could have gotten the B enzyme allele from that parent, and the normal H allele from the other (as well as the A enzyme gene). This would result in type AB.
So, again, its technically possible, but unlikely.
2007-03-15 17:39:49 · answer #1 · answered by Geoffrey B 4 · 1⤊ 0⤋
The Biology Project Blood Type Calculator
Child Blood : AB
Type Parent Blood Type O
Possible Type of Other Parent
Not Possible!
Child Blood Type AB
Parent Blood Type A
Possible Type of Other Parent
B, AB
2007-03-15 16:36:41 · answer #2 · answered by Anonymous · 1⤊ 0⤋
No the only way for a child to have AB+ blood is if one parent is A and one is B. The only combinations that a child from those parents could have is A and O. A child could only have O if the parent with the A+ blood has one recessive alelle.
2007-03-15 16:34:37 · answer #3 · answered by magooi1234 3 · 0⤊ 0⤋
Yes, it is certainly possible.
Blood group involves many factors of which one is Heridity. So, B+ can even be inherited from great-grand parents skipping 2 to 4 generations.
2007-03-15 16:33:54 · answer #4 · answered by Tiger Tracks 6 · 2⤊ 1⤋
Not possible because neither parent has a B to give.
2007-03-15 16:33:09 · answer #5 · answered by ecolink 7 · 0⤊ 1⤋
Huh? This doesn't make sense. What do the parents have?
2007-03-15 17:14:43 · answer #6 · answered by Anonymous · 0⤊ 1⤋
are you sure that the Alliens didn't implent that baby?
2007-03-15 16:37:01 · answer #7 · answered by Anonymous · 1⤊ 1⤋
no
2007-03-15 16:33:43 · answer #8 · answered by Bailey 3 · 0⤊ 2⤋