Each gamete gets only one copy of an allele because it has ____
a. one copy of each chromosome
b. one nucleus
c. one chromosome
d. a diploid number of chromosomes
e. either an X or a Y
ANSWER: a
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The first viroid was found in plants and was a
a. circular DNA surrounded by protein. b. circular RNA surrounded by protein. c. circular DNA with no protein coat. d. circular RNA with no protein coat. e. none of the above.
If a trait is genetically determined, the correlation between DZ twins should be lower than that for MZ
twins. Indicate whether the statement is true or false.
These white blood cells attack virus-infected cells in the body
A) helper T cells B) cytotoxic T cells C) suppressor T cells D) plasma cells
All of the following are routinely done to assure a successful organ transplant and minimize the chance of organ rejection EXCEPT which one?
A) match the ABO blood types of donor and recipient B) match the MHC tissue types of donor and recipient C) irradiate the recipient to knock out his or her immune system prior to the transplant D) give the recipient immunosuppressive drugs to suppress reactions against the transplanted tissue E) give the recipient antibiotics to control any infections