GLOSSARY 529 



Syn-ap'-sis. The conjugation of maternal and paternal chro- 

 mosomes preceding the maturation divisions. 



Syjt-dac'-tyl-ism. The condition of having webbed fingers or 

 toes. 



Te-neb'-bi-o. A genus of beetles, the larva of which is the 

 common meal worm. 



Tee-a-tol'-o-gy. The science which deals with monstrous or 

 abnormal forms. 



Tet'-bads. Bivalent chromosomes which appear 4-parted in 

 the maturation divisions. 



To-tip'-o-tence. The capacity of a cleavage cell to give rise 

 to a whole animal. 



Tox'-in. A poisonous substance particularly such as is pro- 

 duced by bacteria. 



Tbi-hy'-bbid. The offspring of parents differing in three char- 

 acters. 



Tboph'-o-blast. The outer layer of the blastodermic vesicle 

 of a mammal. 



Tbo'-pisms. Automatic movements of organisms toward or 

 away from a source of stimulus. 



Unit Chabacteb. A character which is inherited as a whole 

 and cannot be sub-divided. 



Vegetative pole. The pole of an egg opposite the polar 

 bodies. 



Vil'-li. Processes which grow out from the embryonic mem- 

 branes of a mammal and connect it to the walls of the 

 uterus. 



Vi-tei/-lwe membrane. A delicate membrane around an egg 

 secreted by the egg itself. 



Viv-i-par'-i-ty. Young brought forth "alive," i.e. in an ad- 

 vanced stage of development. 



Zy'-gote. The product of the union of male and female sex 

 cells. 



