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It depends on the mothers genotype for the ABO system. Genotype is what happens at the gene level as her phenotype (what she expresses as a result of her genotype as a whole) is A.
Each parent donates one half of the child's genotype.


In the ABO system, A and B are co-dominant over O (O stands for Lack of Antigen).
Meaning if you have a genotype of A/O you will be A.


Below is a list of possible genotypes and their phenotypes (what the person's blood type will be)


Genotype Phenotype (Blood Type)
A/A A
A/B AB
A/O A
B/B B
B/O B
O/O O


The mother either has a genotype of A/O or A/A (one from each of her parents) if she has an A bloodtype.
Providing the father is definitely O,
If she is A/A, all of her children will be A (child's genotype is A/O)
If she is A/O, there is a 50% chance of her children being O (child's genotype - O/O) and 50% A (Genotype A/O)


The child be will be rhesus positive as their is only one locus for the gene and it is dominant.
(You can only become rhesus negative if both parents are Rhesus Negative.


Genotype Phenotype (Rhesus)
Pos/Pos Pos
Pos/Neg Pos
Neg/Neg Neg

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Q: Can a a positive mother and a o negative father produce a o positive daughter?
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Can a A positive father have an A negative daughter?

Yes.


Can an A positive father and A negative mother produce both A positive and A negative children?

Yes.


Can o positive mother and a A negative father make a O positive daughter?

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Caan ab positive father an a negative daughter?

# yes, if father is + - for RH and mother - - (negative) or + - (positive); the father can generate sons A, B, or AB depending by mother's group.


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Can an o positive mother and an a positive father produce an 0 negative child?

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Can A positive father and A negative mother produce a O positive child?

Yes. The father's phenotype is AO+*; the mother's is OO--.


Can a a positive father and a o negative mother produce a a negative child?

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Can a father who has a blood type O positive can he father a daughter who has O Negative Blood Type?

yes, the mother could o negative


Can an O negative mother and an A positive father produce an O positive child?

Yes. The father's phenotype is AO+*; the mother's is OO--.


Can a O negative father and A positive mother produce a AB positive baby?

the baby may be A or O.