BIO 101 Exam 4 straighterline

Question 1
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You have two true-breeding rose bushes, one with red flowers and one with white
flowers. A cross between these two roses yields a bush with pink flowers. What
condition does this demonstrate?
Select one:
a. codominance
b. incomplete dominance


c. environmental effects
d. polygenetic inheritance
e. monohybrid inheritance
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The correct answer is: incomplete dominance

Question 2
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You have two true-breeding rose bushes, one with red flowers and one with white
flowers. A cross between these two roses yields a bush with white flowers that have red
splotches. What condition does this demonstrate?
Select one:
a. codominance


b. incomplete dominance
c. environmental effects
d. polygenetic inheritance
e. monohybrid inheritance
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The correct answer is: codominance

Question 3
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To try and discover if the environment has an effect on a particular characteristic,
scientists often examine
Select one:
a. siblings that share only one parent and were separated at birth.

, b. fraternal human twins that were separated at birth.
c. identical human twins that were separated at birth.


d. siblings that share both parents and were separated at birth.
e. unrelated children who have been adopted by the same family and grown up together.
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The correct answer is: identical human twins that were separated at birth.

Question 4
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In a Mendelian monohybrid cross involving two homozygous genotypes, the ____
generation is always completely heterozygous.
Select one:
a. F1


b. F2
c. F3
d. P
e. P2
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The correct answer is: F1

Question 5
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Which genetic disorder is associated with a defect in the elastic connective tissue
protein called fibrillin?
Select one:
a. Marfan syndrome


b. Huntington disease
c. sickle cell disease
d. phenylketonuria (PKU)
e. cystic fibrosis (CF)
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The correct answer is: Marfan syndrome

Question 6
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