302 



HEREDITY AND ENVIRONMENT 



Mendelian Inheritance in Man (Continued) 



TERATOLOGICAL AND PATHOLOGICAL CHARACTERS 



Dominant 

 General Size: 



Achondroplasy (Dwarfs 



with short stout limbs 



but with bodies and 



heads of normal size) 



Normal Size 



Hands and Feet: 



Brachydactyly (Short 

 fingers and toes) 



Syndactyly (Webbed 

 fingers and toes) 



Polydactyly (Supernu- 

 merary digits) 

 Skin: 



Keratosis (Thickening 

 of Epidermis) 



Epidermolysis (Exces- 

 sive formation of blis- 

 ters) 



Hypotrichosis (Hair- 

 lessness associated 



with lack of teeth) 

 Kidneys : 



Diabetes insipidus 



Diabetes mellitus 



Xormal 



Recessive 



Normal 



True Dwarfs (With all 

 parts of the body re- 

 duced in proportion) 



Normal (Fig. 67) 



Normal 



Normal (Fig. 66) 



Normal 



Normal 



Normal 



Normal 

 Normal 



Alkaptonuria (Urine 



dark after oxidation) 



