1. Your neighbor has put up a sign to announce the birth of their twins, a girl and a boy. Another neighbor said “Oh, how sweet! I wonder if they’re identical twins.” Without even seeing the twins, what can you tell her?
2. The science class was studying genetics at school and Kendra came home in tears. She told her older sister, “We were doing our family tree and when I filled in our traits, I discovered that Mom and Dad can’t be my real parents ’cause the traits don’t match!” It turns out that Mom and Dad can roll their tongues but Kendra can’t. Could Mom and Dad still be Kendra’s parents?