In the early 1900's he worked on the inheritance of various human traits and wrote several articles with his wife, including reports on the heredity of eye 13 , hair 14 , and skin color 15 .
(he; worked; on the inheritance of various human traits; L:In the early 1900's) (he; wrote; several articles; L:In the early 1900's)
he he
worked wrote
on the inheritance of various human traits L:In the early 1900's
several articles L:In the early 1900's