## What blood type is heterozygous?

When both inherited alleles are O, the genotype is homozygous recessive and the blood type is O. When one of the inherited alleles is A and the other is B, the genotype is heterozygous and the blood type is AB.

What is the genotype of someone who is heterozygous for type O blood?

Someone with blood type O has neither the A nor the B allele. The genotype must be OO.

Is A+ blood type heterozygous?

The possible human phenotypes for blood group are type A, type B, type AB, and type O. Type A and B individuals can be either homozygous (IAIA or IBIB, respectively), or heterozygous (IAi or IBi, respectively).

### Is blood type A heterozygous or homozygous?

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. In people with type AB blood, both A and B proteins are expressed on the surface of red blood cells equally….Codominance.

Blood Type Related Genotype(s)
AB AB
O OO

What is heterozygous type B blood?

Gene has heterozygous type B blood. The genotype of Gene will be IBIb . Molly has homozygous type B blood. The genotype of Molly will be IBIB . Gametes contributed by Gene having dominant allele ( IB ), and recessive allele (b) will be in the ratio of 1:1.

Can a person have AO blood?

If someone has blood type A, they must have at least one copy of the A allele, but they could have two copies. Their genotype is either AA or AO.

#### What is the Punnett square for O blood type?

The O blood type is a recessive allele and for the punnett square it will be written as “oo”. Here is a list of genotypes for each blood type. Let’s try to draw a punnett square with the AB female and the O male.

What is an example of a Punnett square?

Another example where we can use a punnett square is with blood types. Let’s say a female has a blood type of AB and a male has the blood type of O. Both A and B are considered co-dominant meaning that both the A and the B are present on the females blood cells.

How do you find the genotype from a Punnett square?

A Punnett square is used to find genotype. Start making the square by writing all of the possible alleles of the father down a column on the left hand side. This accounts for the first half of the baby’s genetics.

## Is blood type a and B heterozygous or homozygous?

Next, we will match the letters for each box on the punnett square. As you can see from the punnett square, the offspring of these two people would have a 50% chance of the blood type A and a 50% chance of the blood type B. In this case, both of these blood types would be heterozygous because the genotypes consist of the o allele.