Genetics Mini Quiz Take a out a sheet of paper Write your name, date and period in top right-hand corner What is the difference between homozygous and heterozygous genotypes? Show an example of each. (Draw, write, or explain) What is the difference between phenotype and genotype? Explain and give example (Draw, write, or explain) Punnett Square 1. In seals, the gene for long whiskers is dominant (W). a) What percent of the offspring will have short whiskers if a homozygous long-whiskered seal is crossed with a heterozygous long-whiskered seal?