You insert a fragment of sheep DNA into a plasmid containing an AmpR gene. You transform bacteria with the recombinant plasmid, and plate the cells on growth media containing the antibiotic ampicillin. Each colony on the plate arose from _____ that ____ to ampicillin.
A. a single bacterium; is sensitive.
B. many bacteria; are sensitive.
C. many bacteria; are resistant.
D. a single bacterium; is resistant.
D. a single bacterium; is resistant.
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In a P1 cross involving incomplete dominance, ____
a. the dominant phenotype is expressed in the F1 b. the recessive phenotype is expressed in the F1 c. Mendelian inheritance does not apply d. the phenotypic ratio and genotypic ratio in the F1 are identical e. heterozygotes will express the parental phenotype
Emphysema affects about __________ million
people in the United States in a given year. a. 1 b. 2 c. 3 d. 4 e. 5
Which of the following pairs is correctly matched?
a. middle lamella?cellulose b. integrins?receptors c. primary cell wall?pectin d. fibronectins?wood e. secondary cell wall?glycoproteins
The most important role of meiosis in sexual reproduction is
What will be an ideal response?