Over a long period of time, you would expect a deleterious mutation to __________ within a large population
A. increase in frequency
B. decrease in frequency
C. increase or decrease in frequency
D. remain at the same frequency
B
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Why was it important in the studies of Beadle and Tatum that Neurospora is haploid?
a. Because it is easier to grow haploid molds in the laboratory. b. Because haploid molds have simpler nutritional requirements than do diploid molds. c. Because a mutation that arises is not masked by a normal allele on a homologous chromosome. d. Because haploid Neurospora will always mutate. e. Because diploid Neurospora will always mutate.
Which group of arthropods can be distinguished from other groups by their calcium-containing, hardened exoskeleton and mostly marine habitat?
A. Insects B. Millipedes C. Chelicerates D. Crustaceans E. Trilobites
Who proposed that the structure of DNA is a double helix with two polynucleotide chains running in opposite directions and held together by hydrogen bonding between pairs of nitrogenous bases?
A. Meselson and Stahl B. Chargaff C. Franklin D. Watson and Crick E. Hershey and Chase
Many of the signs and symptoms of inflammation, including redness and itching, are due to the release of (histamines/leukotrienes/proteases) by degranulation of mast cells.
Fill in the blank(s) with the appropriate word(s).