The Earth’s orbit shifts approximately every
___ years.
a. 1,000
b. 10,000
c. 100,000
d. 1,000,000
e. 1,000,000,000
C
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Which component of the accompanying scenario would be considered the stimulus?
a. release of insulin b. glycogen and fat synthesis c. potassium ion channel d. increased glucose levels e. liver and muscle
Body appendages as diverse as crab legs,
beetle legs, sea star arms, butterfly wings, fish fins, and mouse feet start out as a. clusters of cells in the limb buds. b. cerebral cells. c. cardiac cells. d. offshoots of the sperm cell. e. offshoots of the egg
Linus Pauling and his colleagues discovered that a mutant gene involved in the synthesis of hemoglobin causes sickle
cell anemia. a. True b. False
A phenotypically normal prospective couple seeks genetic counseling because the man knows that he has a translocation of a portion of his chromosome 4 that has been exchanged with a portion of his chromosome 12
Although his translocation is balanced, he and his wife want to know the probability that his sperm will be abnormal. What is your prognosis regarding his sperm? A) 1/4 will carry the two normal chromosomes, 4 and 12, 1/4 will have only the two translocation chromosomes and no normal chromosomes 4 and 12, and 1/2 will have both normal and translocated chromosomes. B) All will carry the same translocation as the father. C) None will carry the translocation. D) 1/2 will be normal and the rest will have the father's translocation.