A simple graphical way of discovering all potential genotype combinations given parents' genotypes?

• A. Genome
• B. Punnett Square
• C. Pedigree
• D. Karyotype

Answer: (B)

The method used to lay out all possible offspring genotypes from parental alleles is the Punnett square. It’s a simple grid where one parent’s possible gametes appear across the top and the other parent’s appear along the side. By filling each cell with the combination of the two gametes, you can quickly see every potential genotype the offspring could have and estimate the probabilities for each. This works well for a single gene with two alleles, and you can expand the grid for more complex crosses to visualize genotype and phenotype chances.

Other options don’t fit this purpose: a genome is the organism’s entire genetic material, a pedigree traces inheritance across generations in a family, and a karyotype shows chromosome number and structure. None provide the straightforward grid to enumerate all possible offspring genotypes from given parental genotypes.