Establishing a phylogeny for bacteria is more difficult than establishing a phylogeny for plants or animals." This statement is:
A. correct because it is difficult to obtain enough morphological data from bacteria.
B. correct because bacteria can engage in lateral gene transfer.
C. incorrect because bacteria are so small.
D. correct because of the quick generation time of bacteria.
Ans: B. correct because bacteria can engage in lateral gene transfer.
You might also like to view...
Expressed sequence tags (ESTs) allow researchers to identify
A) genes that encode proteins. B) microsatellites. C) introns. D) ring chromosomes.
Genetic studies of an animal show that eye color is controlled by an autosomal gene with the dominant
allele (R) for red eye color and the recessive allele (r) for yellow eye color. A second autosomal gene has the dominant allele (T) leading to paws with thumbs while the recessive allele (t) codes for paws without thumbs. The genetic cross RRTT ? rrtt creates offspring with genotype RrTt. One of those dihybrids is mated in a testcross (RrTt ? rrtt). If the two genes are completely linked (no recombination occurs between them), then the testcross should produce offspring with the phenotype ratio
a. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs. b. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs. c. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs. d. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thumbs. e. 1 yellow-eyed with thumbs: 1 red-eyed without thumbs.
Which of the following is NOT a member of the
Ascomycetes? a yeast b. black bread mold c. truffle d. Aspergillus e. Neurospora
What is the purpose of the lac operon, and under what circumstances is it activated? Describe the structure of the lac operon, including the repressor protein, structural genes, and regulatory regions of the operon
What is the role of catabolite repression in the lac operon?