Answer: Punnett Squares take each of the possible alleles that the parent can pass down and predicts all possible outcomes for the offspring
Explanation:In this example, let’s set the trait for hair color (this is not a real example, it's hypothetical).Capital A is for blonde hair (its dominant)Lowercase a is for brown hair (it's recessive)In the above Punnett square, both parents are heterozygous- they have one Allele for blonde hair and one allele for brown hair. Since blonde hair is dominant, they both have blonde hair.In this Punnett square, 2/4 (50%) of the offspring will have the genotype Aa. This will present itself in the phenotype of blonde hair.1/4 (25%) of the offspring will have the genotype AA, which is homozygous for blonde hair.Lastly, 1/4 (25%) of the offspring will have the genotype aa, and this is homozygous recessive for brown hair.A Punnett square makes this much easier to visualize.