What ratio would a Punnett square show with 2 dominant traits and 2 recessive traits?

In a Punnett square representing two dominant traits and two recessive traits, the expected phenotypic ratio depends on the alleles' combinations being analyzed. When both traits are dominant, typically indicated by capital letters (e.g., A and B for the dominant traits), and the recessive traits by lowercase letters (e.g., a and b for the recessive traits), the crossing of two heterozygous individuals (e.g., AaBb x AaBb) will yield specific ratios based on the combination of dominant and recessive traits.

In this scenario, if both traits are fully dominant and the organism in question expresses only these dominant traits, the resulting offspring would indeed show a phenotype that expresses the dominant traits entirely, leading to a 4:0:0 ratio. This means all offspring exhibit the dominant phenotype due to the presence of at least one dominant allele from each allele pair.

The reasoning behind the selected answer being correct indicates that all offspring resulting from this mating combination would display the dominant traits, while no offspring would inherit both recessive traits. Thus, the absence of recessive phenotypes aligns perfectly with the concept of dominance in genetics, affirming the 4:0:0 ratio as the most accurate depiction of expected phenotypes