Answer: Mendel's cross-pollination of pea plants proved that when two separate plants are cross-pollinated, their genes are passed to their offspring. Some traits are inherited and some are not. Each attribute is inherited independently. Some traits are dominant and some are recessive.
Step-by-step explanation:
Mendel's cross-pollination experiment showed after cross-pollination, some traits inherited by the offspring were dominant and some were not which were recessive. He explained that traits are determined by the genes present in the organisms.
For example, a plant that is small does not guarantee that the offspring should also be small. A recessive gene needs two copies to be inherited in the offspring and the dominant will be present even if there was only one copy.
So Mendel's experiment showed how traits are inherited in the offspring. These traits are inherited independently of each other. And also explains how different traits appear in offspring.