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trait - n. a quality that makes one person or thing different from another
bred - adj. to keep and take care of animals or plants in order to produce more animals or plants of a particular kind
puberty - n. the period of life when a person's sexual organs mature and he or she becomes able to have children
impregnate - v. to make (a woman or a female animal) pregnant
pencil - n. an instrument used for writing and drawing that has a hard outer part and a black or colored center part
iron - n. a heavy type of metal that is very common, occurs naturally in blood, and is used to make steel and in many products
