Can parents with type A and B blood have children with O type blood?

Answer 1

We are looking for the possible blood types of a baby.

Parental information:

• Mother type AO -- contributes A or O gene
• Father type BB -- contributes B gene

Baby receives one gene from each parent:

• Baby is type AB = Type AB
• Baby is type AO = Type A
• Baby is type BO = Type B

With this parental cross, the offspring will be Type A, B or AB. They cannot be Type O because that would require that each parent contributes an O gene, and the BB parent cannot do so.

Answer 2

We are looking for the possible blood types of a baby.

Parental information:

• Mother type A --can be AA or AO = contributes A or O gene
• Father type B --can be BB or BO = contributes B or O gene

Baby receives one gene from each parent:

• Baby is type AO = Type A
• Baby is type AB = Type AB
• Baby is type BO = Type B
• Baby is type OO = Type O -- both parents contributed an O gene

Generally, in order to get that Type O baby, the parents need to have the O gene; therefore they would be AO and BO.

HOWEVER: There is more to ABO blood typing that just the ABO gene.

There is also an inhibitory gene that will change any genotype into the phenotype O.

Therefore a person with genetically AB blood can be tested as having Type O.

If the baby's inhibitory gene has been turned "on", then no matter what ABO genes he receives from his parents, he will test out as a Type O.

Answer 3

If one parent is heterozygous for A and one for B, there is a 25% chance of the offspring having type O. If they are both AB, there is no chance of any O types occurring

Answer 4

Heterozygousity. Simple Mendelian cross; AO X BO, would in ~ 1/4 of the progeny yield a homozygous recessive OO. ( must be homozygous OO to express O )

Answer 5

Yes.the father has a phenotype ao,while the mother bo,probability of their children blood group is ab,ao[a],bo[b],andoo[o].

Answer 6

Believe 1 in 6

Answer 7

Both parents have AO genotypes.

Answer 8

yes