Final answer:
Forget-me-not flowers are most commonly blue, but for the petunia genetics problem, the likely outcome of crossing two violet petunias would be 50% blue flowers and 50% red flowers, as per Mendelian genetics with incomplete dominance.
Step-by-step explanation:
The question regarding forget-me-not flowers and the one involving petunias both relate to the inheritance of flower color traits. Forget-me-not flowers are most commonly blue. However, the question on petunias pertains to genetic crosses and the inheritance patterns of flower color in those plants, which is a Mendelian genetics problem.
Based on the given information, petunias exhibit a pattern of inheritance where crossing a blue flower with a red flower yields violet flowers. When two violet petunias are crossed, one might assume incomplete dominance, where the violet color is a blend of red and blue. Using this as a basis, the most probable result of crossing two violet petunias would involve phenotypes showing both blue and red flowers. As such, 50% of the flowers being blue and 50% of the flowers being red would be a likely outcome, following a Mendelian 1:1:1:1 ratio for a dihybrid cross with incomplete dominance.