Knight — 84 — Dictionary 



Isomere. — A homologous part. 



Isomery. — Having an identical number of individual parts 



in each of several places {e.g. in floral whorls). 

 Isometry. — Similar growth-rate; growth of a part at a 



standard rate or at the same rate as the whole. 

 Isomorphism. — Having a similar form and appearance. Adj. 



Isomorphic, Isomorphous. 

 Isophase. — Pleiotropy, q.v. 

 Isophene. — Isomar, q.v. 



Isophenous. — Belonging to the same phenotype. 

 Isoploid. — (i) Having an even number of sets of chromosomes 



in the somatic cells, (ii) An individual of this type; isopoly- 



ploid. 

 Isopolls. — Lines connecting points of equal pollen percentages 



during equivalent periods of time; applied only to fossil pollen 



(Cain, 1944). 

 Isopolyploidy. — The state of having an even number of sets 



of chromosomes in the somatic cells, e.g. tetraploids, hexaploids, 



etc. 

 Isotropic. — Of an egg: having no predetermined axis. 

 Isozygotic. — Homozygous at a given locus and carrying the 



same alleles. 

 Isozygoty, — Genetical identity. 



