10 HEREDITY OK SKIN COLOR IN NEGRO-WHITE CROSSES. 



Tadle to.— Father without factor for negro N; mother with 2 factor! for negro N. 



KcftrencQ 

 No. 



Parents. 

 M, 



Odapring. 



13, 111 .< * 



10,11.,, 



r 



I'ais w 



THfiS w 



)\. It 

 8, II 

 II, U 

 IH, 11 



!,l, 11 



Id, 11 



. 10, 1 1, ,,,:::; 'i 



. ig, 11 i 



.l», II I J 



, 51, HI I'll!) W 



I 



Tot.il I 



lixpcctation, , , , . , , , 



O-II U-3J J6-40 1 4I-5S I s4-73 



a? 

 .11 

 JS 

 as 

 a? 

 .10 

 38 

 .10 



a.1 



as 



'!: 



as + 



3a 

 3a 



in 



III 



Rcroarlct, 



+ I ch., I yr,, N so, 

 DiirkcliUJ,lll«Bltlinat«. 



Tadle ii. — Father without factor for negro N; mother with 3 factors for negro N, 



Ri'ftTunce 

 No. 



n. If., II 7 



. II, 10, 111 3 , 



11, 31, II ' 7 



U.,li, II Is 



1 B. 2.1.11 5 



; D. 27.11 1, 



J. 7. II I I>a 



J. 14. II 1 VV 



J. 48. II ' 



. S6, I, 



Tolnl.. , 

 E^tpcctation . 



OfTapring. 



o-ii la-JS 30-40 41-SS I S6-7S 



14 

 M-5 



+ 1 ch,, mo., N 8, 



+ I ch., X yr., N aa, 

 + I ch., 7 mo., N zo. 



+ X ch., g mo., N 35* 



'J'aijle 12. — Father ivithout factor for negro N; mother with 4 factors for negro N» 



' N A.\. 



* Includins i N as per cent, 



•^ Including 2. N 35 per cent. 



* 11 8, (J", skin color 53. 33> 1, 8; II n 9. skin 45, 33, lo. I3' 



Table 13. — Father with 1 factor for negro N; mother without factor for negro N. 



• Fmni a mniinff wWto X 45 per cunt N, the mother prohnbly a j-factor colored. Thii man tani heavily 

 atul, ns N + K - 53 per cent, ho doubtless has one foctor for black. 



