White spotting, or piebald trait, characterized by an absence of hair pigment in specific places, is caused by mutant copies of a a) carbohydrate. b) gene. c) lipid. d) steroid

Jasmine, at 33 months of age, is able to engage in some self-care behaviors but still has trouble with tasks such as putting on socks. a few months later, she accomplishes this same task relatively easily. the change in abilities is most likely due to