A researcher examines a microsatellite locus in a wild population of D. melanogaster. She finds that in a sample of 50 individuals, 35 different alleles are segregating. The best explanation for the presence of all of these alleles is:
a. balancing selection.
b. mutation.
c. the neutral theory.
d. overdominance.
e. the law of large numbers.
C
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Homeostasis is the maintenance by organisms of a balanced state of internal conditions
Indicate whether the statement is true or false
Clues from geology and paleontology suggest that simple cells, or their precursors, arose about _____ years ago.
A. 6 million B. 4 billion C. 2 billion D. 1 million E. 3 million
After removal of the RNA primers and replacement with DNA nucleotides, the single-stranded nick adjacent to Okazaki fragments is filled in through a reaction that involves which enzyme?
A) DNA primase B) SSB protein C) RNA polymerase D) DNA ligase E) DNA helicase
Use the Hardy-Weinberg equations: p + q = 1 and p2 + 2pq + q2 = 1. If the dominant allele frequency is 0.8, then what percent of the population will be heterozyous?
A. 0.32 B. 0.16 C. 0.64 D. 0.04 E. 0.40