Question 15-Anatomical features that have no apparent function but resemble structures of presumed ancestors are most accurately referred to as _______________ structures. A) homologous B) adaptive C) analogous D) vestigial E) orthologous Question 16-True or False: Certain genes are found in a diverse array of species, and the percent identity in those sequences is typically the same when all of those species are examined. A) True B) False one of the following most accurately describes a gene family? Question 17-Which A) two or more homologous genes found within a single species B) two or more genes derived from the same ancestral gene C) two or more paralogous genes within the genome of a single organism D) two or more homologous genes found in different species E) None of the above accurately describes a gene family. Question 18-Which one of the following statements about the modular structure of proteins is incorrect? A) The regions of proteins that carry out different functions are called domains. B) Each functional region is typically coded for by a single exon or a series of two or more adjacent exons. C) Duplication and rearrangement of exons can result in proteins with diverse functional modules. D) Exon shuffling has led to the evolutionary incorporation of additional functional regions. E) All of the above statements about the modular structure of proteins are correct. Question 19-Exon shuffling is an example of ________________; the incorporation of a bacterial gene into a eukaryotic genome prior to destruction of the bacterial cell is an example of ________________. A) vertical evolution; horizontal gene transfer B) vertical evolution; endosymbiosis C) gene duplication; gene transfer D) gene transfer; gene duplication E) transduction; transformation Question 20-True or False: Two species with approximately the same number of genes will have those genes in roughly the same location on the same number of chromosomes. A) True B) False Answer Key = 1.A 2.E 3.D 4.A 5.E 6.D 7.B 8.C 9.D 10.C 11.A 12.B 13.C 14.E 15.D 16.B 17.C 18.E 19.A 20.B
Question 15-Anatomical features that have no apparent function but resemble structures of presumed ancestors are most accurately referred to as _______________ structures. A) homologous B) adaptive C) analogous D) vestigial E) orthologous Question 16-True or False: Certain genes are found in a diverse array of species, and the percent identity in those sequences is typically the same when all of those species are examined. A) True B) False Question 17-Which one of the following most accurately describes a gene family? A) two or more homologous genes found within a single species B) two or more genes derived from the same ancestral gene C) two or more paralogous genes within the genome of a single organism D) two or more homologous genes found in different species E) None of the above accurately describes a gene family. Question 18-Which one of the following statements about the modular structure of proteins is incorrect? A) The regions of proteins that carry out different functions are called domains. B) Each functional region is typically coded for by a single exon or a series of two or more adjacent exons. C) Duplication and rearrangement of exons can result in proteins with diverse functional modules. D) Exon shuffling has led to the evolutionary incorporation of additional functional regions. E) All of the above statements about the modular structure of proteins are correct. Question 19-Exon shuffling is an example of ________________; the incorporation of a bacterial gene into a eukaryotic genome prior to destruction of the bacterial cell is an example of ________________. A) vertical evolution; horizontal gene transfer B) vertical evolution; endosymbiosis C) gene duplication; gene transfer D) gene transfer; gene duplication E) transduction; transformation Question 20-True or False: Two species with approximately the same number of genes will have those genes in roughly the same location on the same number of chromosomes. A) True B) False Answer Key = 1.A 2.E 3.D 4.A 5.E 6.D 7.B 8.C 9.D 10.C 11.A 12.B 13.C 14.E 15.D 16.B 17.C 18.E 19.A 20.B
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