any measurable characteristic related to the number of cells in the testicles

MGI:csmith "Cynthia L. Smith\, Mouse Genome Informatics Curator"

ChickenPresent

TroutPresent

QuailPresent

DuckPresent

RabbitPresent

MousePresent

TurkeyPresent

PigPresent

CarpPresent

ZebraFishPresent

SalmonPresent

SeaBassPresent

HorsePresent

GoosePresent

CodPresent

GoatPresent

CattlePresent

SeaBreamPresent

SheepPresent

TilapiaPresent