Mathematics and Society - OS X Lion Server

ANALYZ1NGTRAITS(PAGE 3)c) hitchhiker's thumb--ability to bendtop part of thumb back to almost aright angle with rest of thumb.d) widow's peak--hair grows from apoint in the middle of the forehead.e) clockwise--counterclockwisedirection of hair whorl onthe back of the head.f) upper teeth gap--a small gapbetween the two front teeth.)Other examples can be found in most biology or genetics books. For each examplestudents could try to discover the dominant trait by investigating tree diagrams oftheir families.ADAPTED FROM:Children and Ancestors in Action BiologV Series by Stanley L. Weinbergand Herbert J. Stoltz, Copyright © 1974 by Allyn and Bacon, Inc.Used by permission of Allyn and Bacon, Inc.Genetic Continuity~ and Why You~re You~ intermediate Science Curriculum Study.Permission to use granted by D. C. Heath and Company, and Silver Burdett GeneralLearning Corporation.167