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PUNNETT SQUARE WORK SHEET 1. A botanist crossed a plant that produces YELLOW peas with a Plant that produces GREEN PEAS. Construct a Punnett Square to illustrate the possible off-spring. Green is dominant over yellow. In percentage form What is the most likely out come? 2. The same botanist took two of the “New” pea plants created in problem number 1, and crossed them. Construct a Punnett Square to illustrate what the possible outcomes would be. What percent would be Homozygous Dominant? What percent would be Homozygous Recessive? What percent would be Heterozygous Dominant? What percent would be Heterozygous Recessive? 3. Mr. Jones is tall (Tt). His wife is short (tt) Construct a Punnett square to illustrate the possible outcomes of their child. What is the likelihood of their child Tall 4. The Daughter of Mr. & Mrs. Jones is (Bb). She is married to a man that has brown eyes (Bb). [Blue eyes = bb] What is the probability of their child having Brown eyes? What is the probability of their child having Blue eyes? 5. The Johnsons have had 3 children and are expecting number four. They currently have 3 girls and Mr. Johnson is desperate for a Son. Based on this information, what is the probability of the Johnsons having a boy ? Explain your answer. XY = Boy XX = Girl