Part 2: codominance - predicting stripe color in lizard tails a certain species of lizard can have red stripes, yellow stripes, or red and oranges stripes. an rr lizard has red stripes, an yy lizard has orange stripes, and an ry lizard has red and orange stripes. a lizard with red stripes(rr) mates with a lizard with orange stripes(yy). 3. create a punnett square to show their offspring, the f1 generation. punnett square parent r r y rr ry y yy ry 4. what pattern do you notice in the genotypes of the f1 generation lizards? 5. what are the phenotypes of the f1 generation lizards?