What are the chance of a female with type AB and a male with type A haveing a child with tyoe O?
927834
To answer this question you must look at it through a punnet square.\n\nMother- I^A I^B\nFather- I^A I^A OR I^A i  (i = Type O)\n\nThe mother being Type AB defines for us each of the alleles that make up here blood type: I^A and I^B.  \n\nThe father being Type A provides only one clue: that he has at least one A allele.  Because an A allele will mask an O allele, it is impossible to know whether or not he has homozygous for Type A blood (I^A I^A) or if he is heterozygous for Type A blood (I^A i).  Even as a heterozygote, the father will express Type A blood.  \n\nFor this reason you must create two separate Punnet Squares.  In one the father's genotype will be I^A I^A and in the other his genotype will be I^A i.  In both the mother's alleles will remain constant with I^A and I^B.  \n\nYou will realize, however, that because the mother has no Type O allele (i), there is no possibility that any of their offspring will have Type O blood.  This is because Type O blood only appears when both alleles are for Type O (i i).  Since the father has possibly one O allele, and the mother has no O allele, a homozygous genotype for Type O blood cannot happen.\n\nGood luck!
861545
It depends on what kind of A the Mom is. If the Mom is AA, then 100% of the offspring will be AO. If the Mom is AO, then each offspring has a 50:50 chance of have AO or O.
632674
Agree with above: possible options are A+, A-, B+, B-, AB+ and AB-.\n\nTo go into more detail, and explain why a kid with blood type B is possible:\n\nBlood types are named according to proteins in the blood. If you have protein A but not B, you are blood type A. If you have B but not A, you are blood type B. If you have both, you're AB, and if neither, you're O. (O is "recessive" - it just means that you don't make protein, so to be blood type O, you have to have two O genes.)\n\nYou only need one copy of a gene to make the protein, but we all have two copies (alleles) of each gene. We know the dad has to have one A and one B gene. However, the mom could have two A genes, or only one A and one O.\n\nEach parent gives one allele to the child. If the mom has genes AO, she could give the O to the child. The dad has both A and B. So, if a kid ended up with O from mom and B from dad, its genes would be OB and its blood type would be B.\n\nThe Rhesus factor (Rh) + or - is also recessive. If both parents are carrying a negative gene, and the kid got two copies of the negative gene, then it could be Rh-.
1166346
no, the only time that blood type will be a concern is when the mother is Rh negative, and the father, Rh positive. The baby will be Rh positive like the father, because positive is dominant.\nThe problem with this is that if the baby's Rh positive blood mixes with the mother's Rh negative blood, the mother's blood will attack the baby's blood.\nThis looks bad, but doctors give Rh negative mothers shots before labor (and in any other situation where the blood might mix) to keep the mother and baby's blood from mixing.\nthat is the only genetic disadvantage that blood type can present.\nare congratulations in order?\nif so, CONGRATULATIONS!!!
30692
Yes, but there is an increased risk of their child also having Down Syndrome. Sometimes very mentally retarded people are sterile though, so if this is a question pertaining to a certian someone you know, they'd need to get a check up to find out for SURE.
740852
AB blood group system in Humans is the co dominant type\n\nIf Ur fathers blood group is AB X Mothers ?\n                                                  |\n                                                  |\n                                             Ur's is AB \n\n Answers--->\n--------------------\n\n1. Father AB X Mother AA ----> Ur's may be AA or AB\n\n2. Father AB X Mother OA (Means A-group)      ----> Ur’s AO or BO (means all will be A-group)    \n                               \n\n3. Father AB X Mother AB ---> Ur’s AA (A-group) or AB (AB-group) or BB (B-group)\n\n4. Father AB X Mother BB ---> Ur’s AB (AB-group) or BB (B-group)\n\n5. Father AB X Mother OB  (Means B-group)             \n\n---> Ur’s OA (A-group) or AB (AB-group) or BB (B-group) or OB (B-group)\n                       \nSo, Ur mother’s might be case  1 or 3 or  4 or 5  , but not  case 2
1115203
Can a man have, let's say, B+? Yes.\nCan a woman have, let's say, B+? Yes.\nCan they get married? Yes.\n\nExact same blood type will not be a problem. Only way for problem is if baby is + and mom is -. Only way for that to happen is if Dad is + and mom is -.
143689
The easiest way to understand it is to look at a picture. There's one in the source link at the bottom that has a chart so you can look up both parents and find out about the child. The site also explains why ABO blood typing is not an absolutely reliable test of parenthood, and it explains how the rh factor (the + or -) works. The baby does not have to be the same as either of its parents. Be careful. A lot of people who think they understand this really don't.
216102
NO IT IS NOT\n\nThere are only 2 alleles controlling blood type, which means you can ONLY be either AO, BO, OO, AB, BB, or AA.  \nBoth A and B are codominant, while O is RECESSIVE...which means if one parent is AB and the other is OO there is no way both parents can contribute 2 Os to make a child with that blood type.  \n\nI found this on the website listed below also, for clarification:\n\nParent types:           AB and O   \nPossible types:        A, B   \nImpossible types:    AB, O
299475
It is not possible for a child of two O+ parents to have A+ blood.\n\nThe Rhesus factor (Rh) positive is not a problem - only one parent has to be positive.\n\nHowever, blood groups A, B, AB and O are determined by autosomal dominant transmission - this means that you only have to have one copy of the gene in order to express the trait, and they are not on the sex chromosomes, so both male and female children have equal chances of getting them.\n\nThe "A" and "B" just refer to two different proteins, called A and B (surprise). If you have one copy of the gene, YOU WILL HAVE THAT BLOOD TYPE. The only way to have O blood is to have two recessive O genes. Both parents *have* to be genotype OO. If they have one O and one A gene, then they will be blood type A.\n\nSo, if both parents are O, the ONLY possible blood group for their children is O. If the mother is O and the child is A, the father MUST be A.
756279
As everyone has told you the only type not possible is O\nbecause to get type 0 blood which is recessive you would need a recessive allele from each parent. Obviously if you are AB (which are codominant) you do not have a recessive allele. The child could Inheret either the A alle or the B allele and would end u p with type A, B or AB blood depending upon the allele passed by the other parent.\nI see you also want to know if there are any blood types not possible for the children of a person with O type blood to get. Yes, a person with O type blood cannot end up with a child with AB blood because they have 2 recessive alleles. They could end up with children with A  B or O phenotypes
733154
This is because Barth Syndrome is an x-linked recessive trait.  Girls are primarily only carriers of the syndrome and are Xx.  Thus the son has a 50/50 chance of getting the syndrome and being either xy (affected) or Xy (not affected) due to males only having one X chromosome
239822
Yes it is... My husband and I are both A+ and we have two healthy boys.  There might be a problem if one of the parents have got a negative RH factor, but if the problem is known then the mother is given a shot at the appropriate time and then it is not a risk anymore.
957650
Yes, it is very possible.  O negative means that the child has 2 recessive alleles (genes) for type and 2 recessive alleles for Rh factor.   Therefore, his genes would be oo --.\n\nThis is possible if both parents are heterozygous (have both a dominant and recessive form) for both traits.  That would mean Ao +-.  The A overrides the o and so does the + vs. -.  They show A+ then.  They both give the child the o and - ===> oo --, or O-. \n\nStatistically, 1/4 of their children can be O type, while the other 3/4 appear as A.  Same with + vs -.  One fourth would be negative while the other three fourths would be positive.
217222
Their children will either be A or B.  One parent will give either an A or a B gene and the other can give only O.  Since O is a recessive gene it will take two of them to make an O child.\nGenotypes:\nParents:  \nAB\nOO\nChildren: \nAO\nBO\n\nIf they have only one child there is a 50% chance of A type and a 50% chance of B type.
385194
Yep, we each have two set of chromosomes (genes), one from each parent. There are dominant genes and recessive genes. Mother has an A gene (dom) and a O gene (res), father has a B gene (dom) and O gene (res). The child can have one of 4 blood types A ( A mother, O father), B( B father O mother ), AB ( A mother, B father ) and O ( O mother, O father ) The negative works the same with + being dominant, but both parents are negative.
751580
I have the chart with me which was published in a magazine way back in 1980s. These days i haven't come across it. y don't u try the net???? As per the chart, i have noticed that as the girl's age reaches 30 plus the chances of having a girl is more. But im sceptical abt this cos the sex of the child isn't determined by the mother but by the father.