Gene therapy is a modern approach to preventing infectious disease
Indicate whether the statement is true or false
FALSE
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The nitrogenous base that is only found in DNA and not in RNA is: rev: 02_22_2014_QC_45858
A. cytosine. B. uracil. C. adenine. D. thymine. E. guanine.
In a transect across the 98th meridian (across the great plains) from west to east, which of the following gives the correct sequence of soil orders?
A. Alfisols, Aridisols, Ultisols B. Aridisols, Oxisols, Mollisols C. Aridisols, Spodosols, Ultisols D. Aridisols, Mollisols, Alfisols E. Alfisols, Mollisols, Aridisols
Changes in chromosome number are usually the result of
A. genetic displacement. B. trisomy. C. crossing over. D. nondisjunction. E. disjunction.
In humans, if nondisjunction led to an individual with a genotype of XXY, that person would
A. be male because each cell has one Y chromosome. B. display both male and female characteristics. C. not survive. D. be female because each cell has two X chromosomes.