A Hands-On Exercise to Demonstrate Evolution by Natural Selection & Genetic Drift

Autor/inn/en	Young, Helen J.; Young, Truman P.
Titel	A Hands-On Exercise to Demonstrate Evolution by Natural Selection & Genetic Drift
Quelle	In: American Biology Teacher, 65 (2003) 6, S.444-448 (5 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0002-7685
Schlagwörter	Evolution; Genetics; Biology; Hands on Science; Science Instruction; Teaching Methods; High School Students; Secondary School Science; Scientific Concepts; Animals; Natural Sciences + Suchen Sie Ihr Suchwort? Humangenetik; Biologie; Teaching of science; Science education; Natural sciences Lessons; Naturwissenschaftlicher Unterricht; Teaching method; Lehrmethode; Unterrichtsmethode; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin; Animal; Tier; Tiere; Naturwissenschaften
Abstract	Although students "learn" (i.e., hear about) the components of evolution by natural selection in high school biology courses, few of them truly understand or remember them. Evolution by natural selection, although seemingly simple, requires that several conditions be met. The trait of concern must exhibit variation within the population; this variation must be heritable; and the trait must be associated with differences in fitness. In this article, the authors outline a hands-on exercise that clearly demonstrates these requirements. They discuss first a hands-on method of teaching about natural selection that increases the understanding and retention of this important concept. Then, they discuss the second exercise that demonstrates how genetic drift can lead to changes in phenotype through a random association between phenotype and fitness. The authors like this method of teaching the components of natural selection and genetic drift because it requires few tools and makes the points clearly, without requiring the color and sound of a computer-interactive demonstration. More importantly, students are involved in the demonstration itself, as well as the interpretation of the demonstration. (Contains 1 figure.) (ERIC).
Anmerkungen	National Association of Biology Teachers. 12030 Sunrise Valley Drive #110, Reston, VA 20191. Tel: 800-406-0775; Tel: 703-264-9696; Fax: 703-264-7778; e-mail: publication@nabt.org; Web site: http://www.nabt.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10