The offspring of a cross between two individuals that breed true for different forms of a trait are __________.
Fill in the blank(s) with the appropriate word(s).
hybrids
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When, how, and to what extent any gene control
mechanism comes into play depends on a. the type of cell. b. the cell’s function. c. the cell’s chemical environment. d. signals from the cells external environment. e. all of these.
One of the conclusions drawn from Darwin's theory of evolution is that:a
existing organisms can adapt to environmental changes b. living organisms are composed of basic units called cells c. living organisms contain substances produced by cells d. genetic information can pass from organism to organism by means of DNA e. organisms living today descended with modifications from previously existing forms
__________ are nonessential genetic element that can exist in two ways in the bacterial cell: either integrated into the bacterial chromosome or in the plasmids.
A. Transposons B. F plasmids C. Conjugative plasmids D. Jumping-jack genes
Which of the following is an example of vertical transmission?
A. a sneeze transmitting a cold B. a mother transmitting syphilis to her fetus C. oral-fecal transmission involving a diaper D. drinking contaminated water E. a mosquito bite