How many genotypes are there?
A description of the pair of alleles in our DNA is called the genotype. Since there are three different alleles, there are a total of six different genotypes at the human ABO genetic locus. The different possible genotypes are AA, AO, BB, BO, AB, and OO. How are blood types related to the six genotypes?
How many phenotypes are possible?
As Table 1 indicates, only four phenotypes result from the six possible ABO genotypes….Codominance.
| Blood Type | Related Genotype(s) |
|---|---|
| B | BB or BO |
| AB | AB |
| O | OO |
What are the 4 possible phenotypes for blood?
The four basic ABO phenotypes are O, A, B, and AB.
What blood type lives the longest?
Life Span. Chances are higher you’ll live longer if you have type O blood. Experts think your lowered risk of disease in your heart and blood vessels (cardiovascular disease) may be one reason for this.
What blood type do mosquitoes not bite?
A 2004 study examined mosquito preference for blood type as well as secretor status. The overall results found that: More mosquitoes landed on people with blood type O. However, this result was only statistically significant when compared with blood type A and not to the other blood types.
Do siblings always have the same blood type?
No it doesn’t. Neither of your parents has to have the same blood type as you. For example if one of your parents was AB+ and the other was O+, they could only have A and B kids. In other words, most likely none of their kids would share either parent’s blood type.
What blood type does a child inherit?
Everyone has an ABO blood type (A, B, AB, or O) and an Rh factor (positive or negative). 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.
Can a child have type O blood if parents have A and B?
A mother who is blood type O can only pass an O allele to her son or daughter. A father who is blood type AB could pass either an A or a B allele to his son or daughter. This couple could have children of either blood type A (O from mother and A from father) or blood type B (O from mother and B from father).
Can a child have different blood type than parents?
Yes, a child is able to have a different blood type than both parents. Which parent decides the blood type of the child? The child’s blood type is decided by both parents’ blood type. Parents all pass along one of their 2 alleles to make up their child’s blood type.