| Description | Slide showing black and white table of 'The incidence of consanguinity in the parentage of individuals with certain recessive diseases'.
Title above image reads 'Table 1 - 'The incidence of consanguinity in the parentage of individuals with certain recessive diseases'. (After Neel, Kodani, Brewer, Anderson, Amer. J. Hum. Gen. 156, 1, 1949).'
Table columns are labelled as follows: column 1 - 'Trait', column 2 - 'Incidence of first cousin marriages among parents'.
Handwritten on the slide are the following: 'Gen. pop. Japan [less than or equal to] 4%, Europe [less than or equal to] 0.5%'.
The traits described are: albinism, infantile amaurotic idiocy, ichthyosis congenita, total colour blindness, xeroderma pigmentosum'. |