A set of operator and promoter sites and the structural genes they control defines a(n)
A. repressor.
B. operon.
C. inducer.
D. recombinant.
Ans: B. operon
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In a monohybrid cross
(a) only one trait is being considered. (b) the parents are always dominant. (c) the parents are always heterozygous. (d) no hybrid is produced.
The genotype of an organism constitutes its observable characteristics
A. true B. false
The microorganisms that are regularly found in or on the body, yet do no apparent harm are called
A. abnormal microbiota. B. transient microbiota. C. variant microbiota. D. normal microbiota.
The nematode, C. elegans, and humans have nearly identical numbers of protein coding genes, yet humans have much more complex organismal features. This is an example of:
a. the importance of regulatory networks. b. the G-value paradox. c. cell size paradox. d. A and B. e. None of the above.