A eukaryotic cell that has had a prokaryotic gene inserted is called
A. a genetically engineered cell.
B. a GMO.
C. a genetic recombinant.
D. All of the choices are correct.
D. All of the choices are correct.
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If you wanted to test if antibacterial soap worked better than regular soap, which experiment below has the strongest experimental design?
A. Have two groups of people wash with either antibacterial or regular soap, without knowing which type of soap they are using. B. Have two groups of people wash with either antibacterial or regular soap. C. Have people wash with antibacterial soap first and later with regular soap. D. Have two groups of people wash with either antibacterial or regular soap, with neither the researchers nor the groups knowing which type of soap they are using.
Eggs have receptors that recognize surface proteins on sperm of their own species. This illustrates ____
a. behavioral isolation b. gametic isolation c. hybrid breakdown d. hybrid inviability e. hybrid sterility
Teosinte, a wild relative of corn, was crossed with domestic corn in an attempt to produce a ____ variety
a. herbicide resistant b. pest resistant c. high lysine d. perennial e. higher yielding
Drosophila melanogaster has four pairs of chromosomes (including a pair of sex chromosomes). Sperm from this species are formed by a meiotic process in which homologous chromosomes pair and segregate but do not undergo crossing-over. How many genetically different kinds of sperm could be produced by a Drosophila melanogaster male (XY)?
A) 4 B) 8 C) 16 D) 64 E) 256