Suppose a population splits into two descendant populations prior to any evolution of dark coloration, then splits again after the evolution of dark coloration. Which of the following is true?
a. Changes in coat color tell us something about evolutionary history.
b. Using these analogous traits in building an evolutionary tree might cause us to incorrectly infer a closer phylogenetic relationship between these species than actually exists.
c. In this case, dark coloration is not only a derived trait but it is also shared by two populations because it is a homologous trait.
d. All but B are true.
D
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Most plant viruses have genomes made of:
A. single-stranded DNA. B. double-stranded DNA. C. proteins. D. single-stranded RNA. E. double-stranded RNA.
If you want to determine how the alleles of different loci interact in their various combinations, it is best to have a system where you do not have to worry about dominance and recessiveness
Which of the following would represent a system where you do not have to worry about dominance and recessiveness? A. Homo sapiens B. Garden peas C. Drosophila melanogaster D. Chlamydomonas reinhardtii
The mutations found in the CF gene that result in cystic fibrosis are recessive because
A) the protein produced by the normal allele is sufficient for normal cellular function. B) the CF mutations always result in no protein being produced. C) CF mutations result in a protein that has normal function only if normal CF protein also exists in the cell. D) dominant alleles that cause a fatal disorder, such as cystic fibrosis, cannot be inherited.
The self-splicing of Group I introns
a. requires energy from the hydrolysis of ATP. b. gains energy from exergonic reactions involving inorganic compounds. c. occurs in a series of transesterifications that require no hydrolysis for energy. d. requires energy from the hydrolysis of GTP. e. gains energy directly from an electron transport chain.