True or False: In humans, skin color and weight are partly determined by multiple alleles.

True. In humans, both skin color and weight are influenced by multiple alleles. This is because these traits are polygenic, meaning they are controlled by more than one gene. Each of these genes may have multiple alleles, or versions, that can contribute to the overall phenotype. For example, skin color is influenced by at least three different genes that control the production of melanin, the pigment that gives skin its color. Similarly, weight is influenced by a combination of genetic factors (multiple genes/alleles) and environmental factors such as diet and exercise.