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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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rjt6250 rjt6250
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11 years ago
Is it possible for an individual who is A- to result from a B+ or B- mother and an O+ father.
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wrote...
#1
11 years ago
Unless there is mutation, not possible.
wrote...
#2
11 years ago
No, there are 2 alleles that controll blood type:

B type blood is: "I^Bi" or "I^BI^B"
O type blood is: "ii"
A typle blood is: "I^Ai" or "I^AI^A"

The offspring must have an allele for the blood type from each parent, it can not inherite any combinations of alleles that would allow the child to have A type blood.
RJW
wrote...
#3
11 years ago
my answer is a BIG NO.. well i think so.. because, usually the child always get the blood type from the father, or sometimes from the mother, so where did the letter A came from..
wrote...
#4
11 years ago
NO.

A mother with type B has the alleles IB-IA or IB-i
The father is i-i
(IA-IB = AB, IA-i= A, IA-IA= A, IB-IB= B, IB-i= B, i-i= O)

The father gave an i allele (recessive)
Mom gave an i (child i-i type O) or IB (child IB-i, type B)

Can't determine rhesus factor (+/-) from info given.
wrote...
#5
11 years ago
no
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#6
11 years ago
no
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#7
11 years ago
No, A and B signify 2 different surface marker proteins on the red blood cells. O is a lack of any proteins. So if the parents are B and O then there is no A to give. + and - is another protein called RH factor. Only if the one of the parents have it will the child have it. + means you have the protein, - means you have no protein. So O- means absolutely no surface marker proteins.
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#8
11 years ago
Absolutely not as in this case neither the mother or father have an "A" to contribute to the offspring.
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#9
11 years ago
not possible, since the father is type O, the mother has to be type A or AB to produce an offspring that is type A
wrote...
#10
11 years ago
Only if the father is homozygous for the rare "Bombay phenotype" blood group and it's masking his i^A allele.  This is possible but extremely unlikely.  It's far more likely that "father" isn't the biological father, or that the lab screwed up the blood test for one of these people.
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