People homozygous for a specific high-risk allele of thefto gene ____
a. tend to overeat
b. store more fat
c. are naturally heavier
d. are always overweight
e. cannot undergo gastric bypass surgery
ANSWER: a
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Shannon diversity (Hs)
A. goes up with increases in the number of species sampled and is higher when individuals are more equitably distributed among species. B. is higher when individuals are more equitably distributed among species. C. is independent of abundance. D. increases in areas undergoing secondary succession. E. is higher when individuals are more equitably distributed among species and is independent of abundance.
Two different species are crossed and the second generation (F2) illustrates reduced fitness. This is an example of
____.
a. behavioral isolation b. gametic isolation c. hybrid breakdown d. crossing over e. hybrid sterility
Using the genetic code, predict what type of mutation has occurred in the hemoglobin sickle cell anemia allele. Normal allele GGAAUGAAACAGGAACCC Mutant allele GGAAUGAAACAGGUACCC
A. a point mutation, Val to Glu B. a frame shift C. addition of a new stop codon D. a point mutation, Glu to Val
Which of the following enzymes allows retroviruses to transcribe DNA from ssRNA?
A) protease B) DNA polymerase C) integrase D) reverse transcriptase E) nuclease