Assume that a species has a diploid chromosome number of 24. The term applied to an individual with 25 chromosomes would be ________
A) euploid
B) triploid
C) trisomy
D) aneuploidy
E) aneuploidy and trisomy
Answer: E
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The "QRS" complex visible in a normal electrocardiogram is associated with the
A. excitation from the AV node and depolarization of the ventricles. B. excitation from the SA node and depolarization of the atria. C. excitation from the SA node and repolarization of the ventricles. D. excitation from the AV node and repolarization of the atria. E. activity in the vagus nerve and release of acetylcholine.
Which of the following items will not help treat or eliminate the symptoms of genetic disorders?
a. Dietary controls b. Hormone replacement therapy c. Exposure to carcinogens d. Prescription drugs e. Surgery
How many sperm participate in the formation of fraternal twins?
A) two B) four C) one D) three
Active transport occurs ________ the concentration gradient across a cell membrane.
A. against B. passively against C. toward D. away from E. in between