zygosity

noun

zy·​gos·​i·​ty zī-ˈgä-sə-tē 

: the makeup or characteristics of a particular zygote

also : the genetic relationship between offspring of a single birth especially in regard to being derived from the same or different zygotes

Word History

Etymology

probably from -zygous

First Known Use

1946, in the meaning defined above

Medical Definition

zygosity

noun

zy·​gos·​i·​ty zī-ˈgäs-ət-ē 

plural zygosities

: the makeup or characteristics of a particular zygote