The most successful (largest numbers of
species) forms of life that have ever evolved
are the
a. vertebrates.
b. insects.
c. humans.
d. protozoans.
e. mollusks.
B
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What conclusions did Beadle and Tatum reach in their studies of Neurospora?
a. Each mutant gene affected three enzymes. b. Each mutant gene affected a pair of enzymes. c. Each mutant gene affected only one enzyme. d. Mutant genes had no effect on the enzymes produced by the cells. e. Each mutant gene affected as many enzymes as were present in a particular metabolic pathway.
New gene variations are constantly being introduced into populations through random mutations.
Answer the following statement true (T) or false (F)
The water current in the body of a cephalopod mollusk provides
a. Oxygen for respiration b. Jet power for rapid locomotion c. A means of carrying wastes and gametes out of the body d. All of the choices are cephalopod uses for their body water currents e. None of the choices are correct
In the analysis of quantitative traits, positions on chromosomes called quantitative trait loci (QTLs) are often discussed. In the same context, restriction fragment length polymorphisms (RFLPs) are also discussed. What is the relationship between QTLs
and RFLPs? What will be an ideal response?