In humans, which genetic mechanism led to the formation of the X and Y chromosomes?
A. Translocation
B. Nondisjunction
C. Inversion
D. Reduced crossing over
E. Insertion
Answer: D
You might also like to view...
Most peptic ulcers are caused by
a. antibiotics. b. bacteria. c. heartburn. d. lactose intolerance. e. malnutrition.
What type of medium provides the best opportunity for growing and observing the morphology of isolated colonies?
What will be an ideal response?
In harvesting the chemical energy of the molecules in food:
a) organisms can utilize sugars, lipids, and proteins. b) all macromolecules must first be converted into their hydrocarbon chains. c) all macromolecules must first be converted into proteins or free-form amino acids. d) all macromolecules must first be converted into glucose or another simple sugar. e) all macromolecules must first be converted into glucose.
What percent of the ATP in a typical animal cell is consumed by the Na+-K+ pump?
a. 1% b. 10% c. 25% d. 66%