498 THE EXHIBIT 



BOOTH 9 — HEREDITY 



Theme-sign. 



(a) The Mechanism of Heredity. Ancestral Influences. Types of In- 



heritance. 



(b) Pedigree charts of Constitutional and Physical Abnormalities in Man. 

 Exhibits: 



1. Chart: Chromosomes in man. 



Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



2. Chart: "Mechanism of Mendelian Heredity." 



Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



3. Pedigree charts showing manner of calculating ancestral influence 



in man; the mathematical measure of human heredity based upon 

 average range and chance in the distribution of chromosomes from 

 particular ancestors to the Fi Zygote. (1) Basic formula, (2) An- 

 cestral influence in male, (3) Ancestral influence in female. 

 Exhibited by: Harry H. Laughlin, Cold Spring Harbor, N. Y. 



4. Major types of Inheritance. (1) Recessive, illustrated by pedigree 



showing albinism; (2) Dominant, illustrated by pedigree of cata- 

 ract; (3) Sex-linked, illustrated by pedigree of hemophilia. 

 Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



5. Pedigree charts illustrating inheritance of specific defects, allergic 



conditions, manic-depressive insanity, epilepsy, club foot, diabetes 

 mellitus and the familial incidence of pauperism. 

 Exhibited by: Eugenics Society of Great Britain, 20 Grosvenor 

 Square, London, England. 



6. Photographs and charts showing inheritance of abnormalities. 

 Exhibited by: Prof. Ladislaus Benedek, Debrecen, Hungary. 



7. Pedigree showing Paralysis Agitans. 



Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



8. Pedigree showing five generations of Huntington's chorea. 

 Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



9. Pedigree showing inheritance of cancer. 



Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



10. Charts (2) pertaining to the inheritance of cancer. 



Exhibited by: Dr. C. C. Little, Roscoe B. Jackson Laboratory, Bar 

 Harbor, Maine. 



1. The role of the ovary in the incidence of cancer of the breast. 



2. Inheritance of tendency to form cancer of the breast. 



11. Pedigree showing inheritance of myotonia. 



Exhibited by: Eugenics Record Office, Cold Spring Harbor, N. Y. 



