¿Por qué tú eres tú?
Informational (nonfiction) 2,102 words, Level Y (Grade 5), Lexile 940L.Have you ever wondered why your eyes are blue and your sibling's are brown? Why a friend can roll his tongue and you can't? This informative book answers these questions. Readers will also learn about dominant and recessive traits and how to use a Punnett square to determine the probability of inheriting a particular characteristic.