Which of the following involves one gene masking the expression of another gene?
a. epistasis
b. incomplete dominance
c. codominance
d. recombination
a. epistasis
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Which of the following fungi give off a scent
that is an attractant to female pigs?
a. morels b. yeast c. club fungi d. wheat rust e. truffles
Which of the following statements is not correct about lactic acid fermentation?
a. It is inefficient compared to aerobic respiration. b. It uses glucose as a substrate. c. It produces two ATP molecules for every glucose molecule. d. Oxygen is the final electron acceptor of this pathway. e. Glycolysis is the only energy-yielding step of this pathway
What is key to recognition of a trait whose expression is determined by the effects of two or more genes (polygenic inheritance)?
A) A mating between a homozygous and a heterozygous individual produces more than the expected number of offspring expressing the dominant trait. B) All of the alleles of the gene for that trait are equally expressed. C) Pleiotropy occurs. D) The trait varies along a continuum in the population.
One of the symptoms of global warming is a decrease in the persistence of sea ice in the Arctic, which affects polar bears by:
a. increasing their access to salmon b. reducing the portion of the year that they can reach seals c. improving the chances of survival of their young d. increasing mercury contamination in their tissues and increasing their access to salmon e. increasing risk of stranding far from shore and reducing the portion of the year that they can reach seals