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Offner, Susan – American Biology Teacher, 2014
New phylogenomic tools have made it possible to construct a robust phylogenetic tree of mollusks. This tree can be used to teach important evolutionary principles.
Descriptors: Science Instruction, Teaching Methods, Animals, Genetics
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Offner, Susan – American Biology Teacher, 2013
A point mutation in the MC1R gene, a G-protein-coupled receptor, has been found that could have led to the formation of two subspecies of Solomon Island flycatcher from a single ancestral population. I discuss the many roles that G-protein-coupled receptors play in vertebrate physiology and how one particular point mutation can have enormous…
Descriptors: Genetics, Science Instruction, Animals, Physiology
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Offner, Susan – American Biology Teacher, 2013
The mutation that caused hemophilia in European royal families during the 19th century has been characterized and presents excellent teaching opportunities.
Descriptors: Genetics, Heredity, Genetic Disorders, Foreign Countries
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Offner, Susan – American Biology Teacher, 2010
The Y chromosome is of great interest to students and can be used to teach about many important biological concepts in addition to sex determination. This paper discusses mutation, recombination, mammalian sex determination, sex determination in general, and the evolution of sex determination in mammals. It includes a student activity that…
Descriptors: Biology, Teaching Methods, Genetics, Science Instruction
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Offner, Susan – American Biology Teacher, 2010
The beta hemoglobin protein is identical in humans and chimpanzees. In this tutorial, students see that even though the proteins are identical, the genes that code for them are not. There are many more differences in the introns than in the exons, which indicates that coding regions of DNA are more highly conserved than non-coding regions.
Descriptors: Genetics, Science Instruction, Animals, Human Body
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Baum, David A.; Offner, Susan – American Biology Teacher, 2008
Phylogenetic trees, which are depictions of the inferred evolutionary relationships among a set of species, now permeate almost all branches of biology and are appearing in increasing numbers in biology textbooks. While few state standards explicitly require knowledge of phylogenetics, most require some knowledge of evolutionary biology, and many…
Descriptors: Evolution, Textbooks, State Standards, Biology
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Offner, Susan – American Biology Teacher, 2001
Presents a universal phylogenetic tree suitable for use in high school and college-level biology classrooms. Illustrates the antiquity of life and that all life is related, even if it dates back 3.5 billion years. Reflects important evolutionary relationships and provides an exciting way to learn about the history of life. (SAH)
Descriptors: Biology, Classification, Evolution, Higher Education
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Offner, Susan – American Biology Teacher, 1999
Presents a plain English map of the gene coding for the glycolysis enzymes in humans to be used as a teaching tool. The map can be used to illustrate that every reaction in a cell requires an enzyme, and that every enzyme is a protein coded for by a gene somewhere on the chromosomes. (WRM)
Descriptors: Biochemistry, Biology, DNA, Enzymes
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Offner, Susan – American Biology Teacher, 1993
Describes what can be learned from animal dissections and asserts that models and videos cannot substitute for dissections. (PR)
Descriptors: Biology, Dissection, High Schools, Laboratory Animals
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Offner, Susan – American Biology Teacher, 1998
Argues that reduction in the use of antibiotics would enable antibiotic-sensitive bacteria to flourish. Presents an activity designed to show students how a small, seemingly unimportant difference in doubling time can, over a period of time, make an enormous difference in population size. (DDR)
Descriptors: Bacteria, Biology, Chemistry, Cytology
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Offner, Susan – American Biology Teacher, 1996
Presents a plain English map of the chromosomes of the fruit fly that contains genes from very different kinds of studies. Represents the work of nearly a century by thousands of researchers using a tremendous variety of techniques. (JRH)
Descriptors: Biology, DNA, Evolution, Genetics
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Offner, Susan – American Biology Teacher, 1994
Uses diagrams to aid in discussing how the English map of the human chromosomes, published by Offner in 1993, can be used to illustrate some important questions in evolution, as well as give students a glimpse into some of the mechanisms underlying evolutionary change. (ZWH)
Descriptors: Evolution, Genetics, Instructional Materials, Science Activities
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Offner, Susan – American Biology Teacher, 1994
Uses diagrams to aid in discussing how the English map of the human chromosomes, published by Offner in 1993, can be used to illustrate some important questions in evolution, as well as give students a glimpse into some of the mechanisms underlying evolutionary change. (ZWH)
Descriptors: Evolution, Genetics, Instructional Materials, Science Activities
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Offner, Susan – American Biology Teacher, 1993
Presents an updated map of the human chromosomes, building on a "plain English map" that was previously published. A brief summary of genes research is included in the gene explanations accompanying the map. (PR)
Descriptors: Biology, College Science, Congenital Impairments, DNA
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Offner, Susan – American Biology Teacher, 1992
Presents a chromosome map for 19 known chromosomes in human genetics. Describes the characteristics attributed to the genetic codes for each of the chromosomes and discusses the teaching applications of the chromosome map. (MDH)
Descriptors: Biology, College Science, DNA, Genetics
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