Introduction to Genetic Analysis 16

Introduction to Genetic Analysis 16 - genomes. Figure 1-16...

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15 1.4 Model organisms Caenorhabditis elegans , a tiny roundworm with a total of only a few thousand adult cells. These form a nervous system; a digestive tract with a mouth, pharynx, and anus; and a reproductive system that can produce both eggs and sperm (Figure 1-15d). Mus musculus , the house mouse, the model organism for vertebrates. It has been studied to compare the genetic basis of vertebrate and invertebrate development as well as to explore the genetics of antigen-antibody systems, of maternal-fetal interactions in utero, and in understanding the genetics of cancer. The genomes of all the model organisms discussed above have been sequenced. Despite the great differ- ences in biology there are many similarities in their
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Unformatted text preview: genomes. Figure 1-16 is a comparison of the genomes of eukaryotes, prokaryotes, and viruses. At the end of the book we summarize and compare the inferences made about genetics from the use of the various models. (b) (d) (c) Figure 1-15 Some model organisms. (a) Bacteriophage attached to an infected E. coli cell; progeny phage particles are maturing inside the cell. (b) Neurospora growing on a burnt tree after a forest re. (c) Arabidopsis . (d) Caenorhabditis elegans . [Part a, Lee D. Simon/Science Source/Photo Researchers; part b, courtesy of David Jacobson; part c, Wally Eberhart/Visuals Unlimited; part d, AFP/CORBIS.] (a) 44200_01_p1-26 3/2/04 4:01 PM Page 15...
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