Chapt. 4 section 2 Text Questions (NTXT)
Name:_____________________
Directions: Read pages 118-123 in your textbook. Then, answer the questions below.
1. a) .What is Probability? (Page 118)
a.) a guess about if it will rain
b.) a number that describes how
likely it is for an event to occur
1 b.) If you know the parents alleles for a trait, how can you use a Punnett Square to
predict the probable genotypes of the offspring? (Page 121)
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1 c.) A pea plant with round seeds has the genotype Rr. You cross this plant with a wrinkeled-seed plant,
genotype rr. What is the probability that the offspring will have wrinkled seeds? Use a Punnett Square to help
with the prediction (Page 121)
The probability of wrinkled seeds is ___________________________
2. a). Define Genotype
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(Page 122)
Define Phenotype
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(Page 122)
2 b.) Explain how two organisms can have the same phenotype but different genotypes.
Give an example (p. 122):
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2.c.) A pea plant has a tall stem. What are its possible genotypes? (p. 122)
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3.a) What is codominance? (p. 123) Give an example of codominant alleles and explain why they are
codominant..
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3.b.) What is the phenotype of a chicken with the genotype FBFW ?