CH 11 sec 2 RG
Define the Following:
Probability: ________________________________________________________________________________________
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Punnett Square: ____________________________________________________________________________________
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Homozygous: ______________________________________________________________________________________
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Heterozygous: _____________________________________________________________________________________
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Phenotype: ________________________________________________________________________________________
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Genotype: ________________________________________________________________________________________
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1. How do geneticists use the principles of probability?
2. How do geneticists use punnett squares?
3. You flipped a coin 1000 times with each time landing on heads. The coin is a normal coin and not rigged. What is the
probability on the next flip that the coin will land on tails? ____________ How do you know?
4. An F1 plant that is homozygous for shortness is crossed with a heterozygous f1 plant. What is the probability that the
seed produced will be a tall plant? Use a punnett square to back up your answer.
5. You have a plant with an unknown genotype. Its phenotype has all dominant traits. You have been asked to determine
the genotype of the plant, but are only allowed to cross it with either a homozygous dominant plant or a homozygous
recessive plant. Which one would you chose and why would this cross allow you to determine the mystery plant’s
genotype?
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