Question
In humans, there are three different alleles that contribute to blood type, A, B, and O. The Punnett square shows an example cro:
between two parents, and the table shows the four blood types that result from various combinations of the three alleles.
A
B
AA
AB
0
AO
BO
Blood Type
Phenotype
Genotype
Type A
AA ог AO
Type B
BB or BO
•Type AB
AB
Type O
00
Based on the information, what can be concluded about the alleles associated with blood types?
© Aand B are codominant.
© is dominant over A and B.
O Ais dominant over B.
• B and O are codominant.
Answer
B and O are codominant.