Explain how the centromere-drive hypothesis accounts for rapid evolution at the centromeres
What will be an ideal response?
ANS:
The centromere-drive hypothesis states that any mutation that increases the probability that a chromosome will segregate into an oocyte will be favored by selection. Thus, any change that facilitates the segregation of a chromosome into an oocyte will be rapidly fixed in a population.
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Which of the following statements is true?
a. Organs receive either parasympathetic fibers or sympathetic fibers but not both. b. The sympathetic nervous system that supplies an organ will also provide parasympathetic fibers to it. c. Both the sympathetic and parasympathetic have either excitatory or inhibitory effects. d. The sympathetic branch of the sympathetic system usually speeds up the activities of the body. e. All of these are true.
The vectors of ________ are sand flies
A) beaver fever B) Chagas' disease C) filariasis D) giardiasis E) leishmaniasis
A set of social and behavioral norms that dictate how we should think, speak, dress, and interact within the context of society.
A random change in allele frequency over time that is brought about by chance alone is known as ____
a. genetic drift b. gene flow c. natural selection d. disruptive selection e. balanced polymorphism