The process of imprinting of a gene:
A. ensures that both alleles of a particular gene contribute to the phenotype.
B. is a mechanism to completely shut down the expression of an allele derived from one parent in a diploid cell.
C. relies on the DNA sequence alone.
D. All of the choices are correct.
B
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Which of the following events is least likely to result in a genetic change in a bacterium?
A. pilus formation B. conjugation C. specialized transduction D. generalized transduction E. natural transformation Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about horizontal gene transfer? How does it relate to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
The dark middle layer of the eye that prevents the scattering of light is the
a. fovea. b. retina. c. sclera. d. choroid. e. cornea.
The scientific study of organisms with the ultimate goal of characterizing and arranging them in an orderly manner is ________.
A. systematics B. taxonomy C. classification D. identification
Considerable evidence indicates that the null model of community structure is incorrect because
A) each species responds independently of other species to the prevailing physical environment. B) interactions among species have no significant influence on community structure. C) when one species is removed, the populations of the other species are unaffected. D) species interactions modify the fundamental niche of the species involved, influencing their relative abundance and, in some cases, their distribution.