Inheritance of Blood Groups Flashcards
1
Q
What four potential blood types do humans have?
A
- O
- A
- B
- AB
2
Q
What are the three different alleles for the gene for blood type in humans?
A
- I^O
- I^A
- I^B
3
Q
What is special about I^A and I^B?
A
They are codominant with each other.
4
Q
What does codominance mean, for I^A and I^B?
A
When an individual has both of these alleles (genotype IAIB), then they’ll have the blood type AB - one allele is dominant over the other one.
5
Q
What is special about I^O?
A
I^O is recessive.
6
Q
What blood type would you get if you had a genotype of IAIO, and why?
A
You would get blood type A, as I^O is recessive.
7
Q
When would you only ever get blood type O?
A
When you have two of the recessive alleles (IOIO).
