L 909-10.] The Significance of the Correlation Coefficient, etc. 491 
Case (a). — Let the hybrid offspring be distinguishable at birth, develop- 
ing the resemblance to the dominant later, a condition frequently seen. The 
correlation table is as follows — 
Parent. 
Offspring. 
(a, a). 
(a, b). 
(b, b). 
(a, a) . 
2 + m 
2 - m 
(a, b) . 
2 + 2m 
4- 2m 
2 
(b, b) . 
m 
2 - m 
2 
which gives a correlation coefficient between parents and offspring at birth 
of the latter, 
(8 + 4 m - rnPf ’ 
Table of Values. 
m = 0 r='500 I m— 1 r=' 426 
m=’ 5 r=* 453 m = 1*5 r= '412 
32. Case (b). — Let a normal population (a, a), 2 (a, a), (a, b), mate at 
random, and let dominance appear among the offspring later. The normal 
correlation table, 
Parent. 
Offspring. 
(a, a). 
(a, b). 
(b, b). 
(a, a) . 
2 
2 
(a, b) . 
2 
4 
2 
(b, b) . 
2 
2 
then becomes — 
Parent. 
Offspring. 
(a, a). 
(a, b) 
(b, b). 
(a, a) . 
2 + m 
2 + 2m 
m 
(a, b) . 
2 - m 
4 - 2m 
2 - m 
(b, b) . 
2 
2 
