Question

In humans there are three alleles at the ABO locus causing blood types A, B, AB, O. How many genotypic and phenotypic combinations are possible in the offspring of a brown-eyed, red-haired, taster man with AB blood group (Bb rr Tt AB) married to a blue-eyed, non-red haired, taster with type A blood (bb Rr Tt AO) woman?

Answer 1

So Male is AB
and Femlae is AO

so on crossing there ;

........A ......O

A....AA... AO

B ...AB... BO

So genotypes ; AA , AO , AB, BO
And phenotypes; Blood types A, AB , B

*used dots in punnet as i do not get proper spacing !!