Calculate the genotypes and genotypic proportions of a cross between AABb and Aabb parents How many different F1 genotypes are expected in a dihybrid cross between P0 heterozygous for all phenotypes when they behave in a dominant & recessive pattern? How many phenotypes? A heterozygous pea plant produces violet flowers and round seeds. Describe the expected genotypes of the gametes produced by Mendelian inheritance. If all genes are on the same arm of a chromosome, would the inheritance patterns follow Mendelian genetics? .