SO HEREDITY AND SEX 



eel] of the /•', pink flower segregates into "white" and 

 "red," which by chance combination give the white 

 pink, and red flowers of Fi. The white and red flowers 

 are pure ; the pink heterozygous, i.e. hybrid or mixed. 

 In this case ncit her red nor white dominates, so that the 

 hybrid can be distinguished from both its parents. 



-O O 



o o o 



Fig. 45.— Illustrating history of gametes in cross shown in Fig. 44. A 

 white and a red bearing gamete unite to form the pink zygote in F\, whose 

 gametes, l).v segregation, are red and white, which by random combinations 

 txiv«' the Fi zygotes, etc. 



Mendel tested his hypotheses in numerous ways, that 

 I need not now discuss, and found in every case that 

 the results coincided with expectation. 



THE HEREDITY OF A SEX-LINKED CHARACTER 



We are now in a position to see how Mendel's funda- 



