What are the phenotypes and genotypes of the f1 generation in a Mendelian genetics problem about blood types?

A man who has blood type A negative blood and a woman who has heterozygous Type B positive blood have children. What are the phenotypes and genotypes of the f1 generation?|||I'm assuming the male has homozygous AA genotype because the question points out that the female is heterozygous B postive.





Thus, the male contributes only A- gametes, while the female contributes 1/4 B+, 1/4 B-, 1/4 O+ and 1/4 O-





So the genotypic ratios are:


1/4 A-B+


1/4 A-B-


1/4 A-O+


1/4 A-O-





and the phenotypic ratios are


1/4 AB positive


1/4 AB negative


1/4 A positive


1/4 A negative|||Odd question as we usually don't use F1 for humans...


Also you don't say if man has homozygous or heterozygous A.


A type can be AO or AA must be --


B type can be BO or BB and +- or ++


do you mean heterozygous for both for woman homozyg for both for man?


AA vs BB would have only AB offspring


-- vs ++ would have only +- offspring


so children would be AB+-