If your mother is heterozygous for Huntington’s disease, which is caused by a dominant allele, the odds that you will
inherit the disorder from her are ____.
a. 1/4
b. 1/2
c. 3/4
d. 1
e. 0
ANSWER: b
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True or False: A biological clock is a set of molecular mechanisms that cycles on its own and thus keeps a regular rhythm
A. true B. false
The endosperm of a plant
a. is the food supply for the new sporophyte plant. b. is composed of haploid tissue. c. protects the young embryo within a seed. d. provides a connection between the ovary of a flower and a developing seed. e. produces sperm cells.
Which of the following is false regarding bronchitis?
a. It can result from chronic irritation of the ciliated lining of the bronchioles. b. Irritated epithelial cells decrease their production of mucus. c. Bacteria colonize the epithelial mucus. d. Early attacks are treatable. e. Fibrous scar tissue forms in chronic bronchitis.
With regard to traits, attached earlobes is considered ____
a. a neutral trait b. a beneficial trait
c. a mutation d. deleterious e. adaptive