When two alleles of the same gene are identical, the individual carrying those alleles is said to be ____
a. dominant
b. heterozygous
c. recessive
d. genotypical
e. homozygous
ANSWER: e
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For which axon might you expect action potential propagation to be the fastest?
a. a myelinated axon with a small diameter b. an unmyelinated axon with a small diameter c. a myelinated axon with a large diameter d. an unmyelinated axon with a large diameter e. axon myelination and diameter do not affect action potential propagation rate
What enzyme protects the linings of internal tubes from bacteria?
a. lactic acid b. complement c. cytokine d. mucus e. lysozyme
Clasp your hands together (without thinking about it). Which thumb is on top every time you do this? The dominant phenotype is left thumb on top. If you have the genotype tt, which thumb is on top?
A. left B. left 50% of the time and right 50% of the time C. left 25% of the time and right 75% of the time D. right E. left 75% of the time and right 25% of the time
In polymerase chain reaction technology, the two strands of DNA are separated by:
a. gel electrophoresis. b. treating them with restriction enzymes. c. centrifugation. d. exposing them to high pH. e. heating them.