Problem II: Yellow seed colour is dominant to green seed colour and Axial flowering plants are dominant to terminal flowering plants. If a Heterozygous yellow terminal plant is crossed with a green heterozygous axial plant what are the Genotypic an Phenotypic ratios of the first generation ?
Let's assume that yellow colour is encoded by the Y allele, green colour is encoded by the y allele, axial flowering is encoded by the A allele and terminal flowering is encoded by the a allele. A genotype of a heterozygous yellow terminal plant is Yyaa and a genotype of a green heterozygous axial plant is yyAa. The gametes are:
Yyaa: Ya and ya.
yyAa: yA and ya.
From here, the genotypes of the offspring are:
YyAa, yellow axial (25 %);
Yyaa, yellow terminal (25 %);
yyAa, green axial (25 %);
yyaa, green terminal (25 %).