What is Yesenia's favorite physical feature and how did it get destroyed?

Yesenia has hair unlike the hair of any other member of her family. It is straight, black, shiny, and smooth, and every female member of her family is jealous of Yesenia's luck. By the time her grandmother Dona Tina's decision to chop off Yesenia's hair with a pair of poultry shears is portrayed, therefore, the reader understands the depth of Yesenia's pain, particularly because she is often teased for every other element of her physical and intellectual makeup.