What is the genotype for the B allele?

Their genotype is either AA or AO. Similarly, someone who is blood type B could have a genotype of either BB or BO. … Someone with blood type AB must have both the A and B alleles. The genotype must be AB.

What genotype is homozygous for the B allele?

Thus, if one parent is homozygous for type A blood and the other is homozygous for type B, the offspring will have a new phenotype, type AB.

Codominance.

Blood Type Related Genotype(s)
B BB or BO
AB AB
O OO

What are the alleles for blood type B?

Human blood type is determined by codominant alleles. There are three different alleles, known as IA, IB, and i. The IA and IB alleles are co-dominant, and the i allele is recessive. The possible human phenotypes for blood group are type A, type B, type AB, and type O.

What is heterozygous type B blood?

Heterozygous means one dominant & one recessive allele. Since they are Type “B”, the dominant allele is IB, & the only recessive allele for blood type is “i”. So the both parents are IBi, & the cross is IBi x IBi.

What percentage of offspring is blood type B?

So each child has a 75% of being B and a 25% chance of being O. Note that genetically, not all of the B blood type kids are the same. The BB child will only pass down the B version of the gene.

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Which blood group person should not marry?

So Rh +ve man should try to avoid marrying Rh-ve lady. Newborn with erythroblastosis fetalis may need an exchange transfusion. In 1st pregnancy, the problem is less severe but in subsequent pregnancies, a problem becomes more severe.

What blood type is iBi?

The following genotypes will yield these blood types: • iAiA or iAi – Both genotypes produce the A protein (type A). iBiB or iBi – Both genotypes produce the B protein (type B). iAiB – This genotype produces the A and B protein (type AB).

What is the genotype code for type B blood?

Similarly, someone who is blood type B could have a genotype of either BB or BO. A blood test of either type AB or type O is more informative. Someone with blood type AB must have both the A and B alleles. The genotype must be AB.

Is Type B blood dominant or recessive?

ABO Blood Type

Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive.

What blood types should not have babies together?

When a mother-to-be and father-to-be are not both positive or negative for Rh factor, it’s called Rh incompatibility. For example: If a woman who is Rh negative and a man who is Rh positive conceive a baby, the fetus may have Rh-positive blood, inherited from the father.

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