Final answer:
When crossing a heterozygous gator with a homozygous dominant one, all offspring will have blue skin since blue is the dominant color, resulting in a 100% probability of blue gators.
Step-by-step explanation:
The question pertains to genetics, specifically inheritance patterns and dominance in hypothetical creatures called Gateway gators. When a heterozygous gator (Bb) is crossed with a homozygous dominant gator (BB), the possible genotypes of the offspring can be determined by creating a Punnett square. In this scenario, the possible genotypes for the offspring are BB and Bb.
Since blue is the dominant skin color, both BB (homozygous dominant) and Bb (heterozygous) gators will have blue skin. Therefore, the probability of having a blue gator in this cross is 100%, as all possible offspring will exhibit the dominant blue color.