From exhibil, American 



Museum of Natural Ilislory 



SEX LINKED INHERITANCE 



V\liit<- !•><■ lolor in tlio [joiuice fly is one of a number of characters which are sex-linkeii. The diugraiu represents 



the chromosomes of the pomice fly, circles referring to body cells and ovals to germ cells. The sex chromosomes are 



shown above and below the ordinary chromosomes (see text), the factor for eye color which each one carries being 



indicated by an initial. The odd-.shaped figure is the '■ Y" chromosome. When this is present the individual is a male 



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