IV. ««howinn the four daug-hters of one son, III-J, tliree ilaiiRhters havinn inherited the white forelock and one lias not. V. sliowinf; the children of these four daugliters who married men without a white forelock : some of the cliildren of each of the three mothers possessing the white forelock have inlierited it but none of the children of the other tuotlier not possessing it have the white forehnk.

Lyle Fitch "Inheritance of a White Forelock," The Journal of Heredity, Novemtwr, 193 7, American Genetic Auociation, Washington, D. C. SCALE .9

B. Five Successive Generations Showing Donninant Inheritance of a White Forelock in the Logsdon Family.

Explanations below a geneology chart are helpful and should be used frequently.

GENEOLOGY AND GENETICS CHARTS

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In several places in this cliart the inheritance sinuilates tliat of a sex-linked dominant character, but tlie pedigree as a whole proves that the apparent association with sex is purely fortuitous. The largest sector in which sex-linked inheritance is suggested is bracketed with a dotted line.

Mablr R. Walter. "Five Grnrrations of Short DiRits," The Journal of Heredity, April, IQ38, American Genetics Association, Washington. D. C.

Pedigree Chart Showing Five Generations of Short Digits.

1. Deformed individuals are represented by solid symbols.

2. The use of a circular heredity chart is helpful when the number of persons in the fourth

or fifth generation would necessitate too long a chart.

GRAPHIC PRESENTATION

Codex Book Co., Inc., Norwood, Mats.

A. A Genealogical Charf Sheef.

1. This sheet is 8'/2" x 11" and its purpose is to show graphically the genealogy of a