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. Children. M. F. MM. MF. FM. FF. i Fair. | Inter. Brun. Row. 8 f f i i f f Rud. 9 f f br f f f Sch. 10 f f f f f f Sco.—2 6 f f br f f f She.—2 3 f f f f f f Shi.—1 2 f f f i f i Sim. 4 f f br f f f Smi.—1 2 1 f f i i — i Spa. 2 4 1 f f br f f — Str.—2 4 2 f f i f f i Sve. 6 f f br f f f Tau.—2 3 1 f f f — i i Tud.—1 3 f f f f f f Vel. 9 1 f f f f i f Ver. 5 f f f f f f Wan. 3 f f i f f i War.—1 3 1 f f br f br br Wes. 4 f f br f f f Wha.—1 1 9 f f f f f f AVhi.—1 ' 3 f f f f f f Win. 7 f f f f — Wof. i 7 f f f f f f Totals (378) 348 25 5 77 families. sist of two blond, one intermediate and one brunet off- spring, the new record gave tlie mother as intermediate instead of blond, and the brunet child as light brunet or intermediate, but somewhat darker than the mother. These two families and a third (which is inaccessible) comprising five Idonds and four brunets, were therefore struck out from the blond X blond table, leaving only four brunets, or about 3 per cent., among the 135 off- spring, recorded in Table Ia. Tables Ia and Ib give 9 brunets among 513 children, or 1.75 per cent. Keeping in mind the probability of occasional blunders on the part of the recorders, it seems doubtful if these nine cases are properly included. The conclusion seems justified that when both parents have blond complexion or fair skin all of their children ivill have a similar fair skin. (b) Brunet X Blond {fair) (Table II).—The off- spring of dark by light skin color is of importance be- cause it should throw additional light on the question of dominance, if any. The families of two such parents are