This link is the punnett square calculator
https://scienceprimer.com/punnett-square-calculator
Blood type review
Phenotype
Genotype(s)
A
AA or AO
A is dominant
Produces A antigens
B
BB or BO
B is dominant
Produces B antigens
AB
AB
A and B are both dominant
Produces both A and B antigens
O
OO
O is recessive
Produces no antigens
Examples of some simple squares:
AA+AB= 50% AA (Homozygous for A), 50%AB
A
B
A
AA
AB
A
AA
AB
AB+OO= 50% AO (heterozygous for A), 50% BO (heterozygous for B)
O
O
A
AO
AO
B
BO
BO
Always use capital letters for co-dominant traits like blood type.
You can also use “I” with a superscript, as described in the video. I find this method a little easier.


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