Heredity of skin pigmentation in man / Gertrude C. Davenport and Charles B. Davenport.

  • Davenport, Gertrude C.
Date:
[1910?]
Catalogue details

Licence: In copyright

Credit: Heredity of skin pigmentation in man / Gertrude C. Davenport and Charles B. Davenport. Source: Wellcome Collection.

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    Family Name. Blond. ; •1 Inter. Brun. M. F. 1 MM. MF. FM. FF. ri 1 1 ! HH Inter. 3 u Mat. 2 bl i br br i br bl i br McC. 5 br , f br 1 br f 1 br 1 Mil. 3 2 br : bl bl — bl i Mil.—B 2 4 bl br bl bl br br Moo. - br bl • 1 br i i 2 Owe.—1 br f f br — * 2 Par. 2 ! 2 2 f br i f f br Pat. br bl br i br br 1 3 Pre. 3 2 1 br bl • 1 br bl br Red. 2 br bl br i bl bl Rei.—1 2 2 2 br f i f d.br f Rel. 1 2 br bl — — — — Ril. 3 1 2 bl br i bl i i Sca. 3 1 bl br bl bl bl br Smi.—E br bl bl — 4 Spr. 2 o bl br — — dark Ste.—C 2 3 bl br i bl br i Ste.—2 2 br f f f f f Str.—D 2 bl br i br br bl Syk. 6 1 1 bl br — — br br Tat. 5 1 ' br bl br br bl bl Van.—1 br f f br f i 2 1 Ven.—1 4 1 f br i i br br Vos. 1 2 ; i bl br i i br br War.—A 1 1 br bl , br i i i Wen. 4 2 2 br f ! f ' — i f Whi. ! 1 f v.br ; f v.br f v.br 9 Whi. 2 4 4 ' f br i f f br f Whi.—3 3 2 2 f br ! f i f br Wil. 2 2 bl br i bl br br Wol. 2 1 1 f , br f d.br i f • Wor. 3 1 1 bl ! br bl br — — Wyb. 4 br 1 f 1 i 1 1 i f f Total (342) 193 58 1_91 1 1 1 (60) 0 30 31 Total: 88 families. 70 families. v.l>r, very brown. 18 families. given in Table II, and are divided into two classes, viz., those containing blond offspring, on the left side of the table, and tliose containing none, on the right side. The division is made in accordance with the hypothesis that ‘‘brunet^’ is dominant to ^Hhond’^ and that the brunets may be of two sorts, either duplex or simplex, in respect to the pigmentation character. If the pigmentation fac- tor of the dark parent is duplex no blonds are to be ex- pected, but if the dark parent is simplex in pigmentation half of the children will have little or no black skin-pig- ment. By hypothesis the simplex parents should be about twice as numerous as the duplex. In Table II there are 70 families with blond children to 18 without