Exploring Genotypes and Phenotypes in Crossbreeding

Explanation:

In a cross involving parents homozygous for axial and terminal alleles, where axial is dominant to terminal, the possible genotypes and phenotypes in the F1 generation are Aa genotype and axial phenotype. This means that one parent has the genotype AA (axial) and the other parent has the genotype aa (terminal), resulting in the F1 offspring having the genotype Aa and displaying the axial phenotype.

In the F2 generation, the possible genotypes are AA, Aa, and aa. This is because when the F1 offspring with genotype Aa are crossed, they can produce offspring with genotypes AA (axial), Aa (axial), and aa (terminal). Therefore, the F2 generation can exhibit a variety of genotypes. As for the phenotypes, the F2 generation can show both axial and terminal phenotypes, reflecting the genetic diversity resulting from the crossbreeding of parents with different alleles.