An Orchid Breeder Is Interested in Increasing the Number of Stems

An orchid breeder is interested in increasing the number of stems and the length of stems that can be produced by an orchid plant.She finds a segregating population that contains a wide range of both stem number (ranging from 2 to15 stems per plant)and stem length (ranging from 2 to 7 inches in length).She selected plants from this population that either had the most stems per plant or the longest stems per plant (shown as filled regions in the diagrams below).She then interbred the plants with the most stems (or the longest stems)and grew the resulting populations of orchids.Following an additional round of selection and breeding,the breeder drew graphs to look at the distribution of plants in each generation.Shown below are graphs representing the distribution of plants in each generation in terms of stem number and stem length (in inches).For each trait,determine whether or not the trait is heritable.Justify your answers.