606 6> Vererbungslehre. 



de ceux que Giard a observes et reunis, chez les aniinaux, sous la denomi- 

 nation de progenese. C. L. Gatin (Paris). 



1668) Dop, P. (Faculte des Sciences de Toulouse), Anomalie fl orale 

 du Buddleia officinalis Maxim. 

 (Association francaise pour TAvancement des Siences 39. p. 93 — 95. 1911.) 

 Les fleurs de l'echantillon prösentaient 4 etamines inserees sur l'ovaire, 

 au lieu d'etre fixees sur la corolle. C. L. Gatin (Paris). 



6. Vererbungslehre. 



(Siehe auch Nr. 1523, 1524, 1610, 1615, 1623, 1635, 1682, 1689, 1690, 1711.) 



1669) Darbishire, A. D. (Edinburgh University), Breeding and the 

 Mendelian Discovery. 8°. Cassell and Co., London, 1911. pp. VIII 

 + 282. 4 coloured plates and 34 figures. 



An excellent introductory account of Mendelian inheritance, with un- 

 prejudiced discussions of doubtful questions, and admirable new figures and 

 diagrams. Doncaster (Cambridge). 



1670) Doncaster, L. (Cambridge University), Note on the inheritance 

 of characters in which Dominance appears to be influenced by 

 Sex. 



(Journal of Genetics 1,4. p. 377—379. 1911.) 



In the inheritance of Colour-blindness and other sex-limited affections, it 

 has been assumed that the affection is dominant in the male, recessive in the 

 female. This paper suggests that this view is mistaken; the phenomena are 

 explained, and brought into line with other cases of sex-limited inheritance 

 (e. q. Abraxas, Drosophila) if it is assumed that the male is always 

 heterozygous for normality, the female homozygous, and that normality is 

 always coupled with the sex-determinant. If normality is replaced by its 

 allelomorph colour-blindness in the male, the male becomes colour-blind because 

 he is now homozygous for the absence of normality. If the female receives 

 the factor for the affection from one parent, she does not show it, since the 

 receives the factor for normality from the other parent, and is thus hetero- 

 zygous for the affection. Doncaster (Cambridge). 



1671) Bateson, W. and R. C. Punnett, On Gametic Series involving 

 reduplication of Certain Terms. 



(Journal of Genetics 1,4. p. 293—302. 1 Plate. 1911.) 

 The authors have shown in previous papers that when two factors exhibit 

 partial coupling when both are introduced into a heterozygote from the same 

 parent, they exhibit „repulsion" when introduced from different parents. In 

 the present paper they show that the repulsion is also incomplete, and indi- 

 cates gametic series similar to those found for coupling. For example, a 

 mutation of the sweet-pea arose which they call „Cretin", which is recessive 

 to the normal form. It was crossed with a plant having sterile authers (re- 

 cessive to fertile). The F, plants were normal fertile. F 2 gave a total of 

 336 NF t , 150 Nf, 143 nF, 11 nf (N = normal, n cretin, F fertile, f sterile). 

 This is a close approximation to the expectation if gametes are formed in the 

 ratio of 1 NF, 3 Nf, 3 nF, 1 nf. Similarly, evidence is given of partial re- 

 pulsion between blue colour and long pollen, suggesting gametes in the ratio 





