What feature of the ribosomal RNA (rRNA) gene makes it a good choice for phylogenetic analysis? Group of answer choices eukaryotic organisms have ribosomal RNA, but archaea and bacteria use a different enzyme to make proteins sequence differences correspond to evolutionary distance rRNA breaks down easily so the rate of its decay is associated with evolutionary relationships mutations in the rRNA gene are always lethal, so the genes are identical across biological classifications
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Step 1: Ribosomal RNA (rRNA) is a good choice for phylogenetic analysis because it is ubiquitous in nature, found in archaea, bacteria, and eukaryotic organisms. Show more…
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Ribosomal RNA is used to compare evolutionary relationships between organisms because It is required for processes that all organisms share, such as protein synthesis. It does not get translated into a polypeptide. It is the easiest to sequence thus several organisms can be sequenced simultaneously. It is more likely to have mutations and thus lead to evolution.
John N.
Ribosomal RNA (rRNA) genes are present in the nuclear genome of eukaryotes. There are also rRNA genes in the genomes of mitochondria and chloroplasts. Therefore photosynthetic eukaryotes have three different sets of rRNA genes, which encode the structural RNA of three separate sets of ribosomes. Translation of each genome takes place on its own set of ribosomes. The gene tree shows the evolutionary relationships among rRNA gene sequences isolated from the nuclear genomes of humans, yeast, and corn; from an archaeon (Halobacterium), a proteobacterium (E. coli), and a cyanobacterium (Chlorobium) and from the mitochondrial and chloroplast genomes of corn. Use the gene tree to answer the following questions. Why aren't the three rRNA genes of corn one another's closest relatives?
How do the following genomic features of prokaryotic organisms compare with those of eukaryotic organisms? How do they compare among eukaryotes? a. Genome size b. Number of genes c. Gene density (bp/gene) d. Number of exons
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