Heterozygote — 73 — Homologous Chromosomes 



Holotype, — A single specimen selected from the cotypes 

 (q.f.) and designated the type. 



Homeokinesis. — Normal mitosis in which the daughter nuclei 

 each receive a similar and equal chromosome complement, 



Homeologous Chromosomes. — See Homoeologous Qiromo- 

 somes. 



Homeologue. — A homoeologous chromosome, q.v. 



Homeoplastic Graft. — A tissue graft made between indi- 

 viduals of the same species, cf. Heteroplastic Graft and Xeno- 

 plastic Graft. 



Homeosynapsis. — Homosynapsis ; the pairing of homologous 

 chromosomes. 



Homeotypic Division. — The second meiotic division. 



Homoeologous Chromosomes. — Chromosomes that are 

 homologous in parts of their length (Huskins, 1941). 



Homoeologue. — A homoeologous chromosome, q.v. 



Homoeosis. Homoosis. q.v. 



Homogametes. — Gametes which are alike in their properties 

 of sex determination. 



Homogametic. — Producing gametes with identical properties 

 of sex determination and which are all alike as to the chromo- 

 somes which they contain. 0pp. Heterogametic. 



Homogametic Sex. — The homozygous sex; that sex which 

 produces gametes of only one kind with regard to their 

 properties of sex determination. See X- and Y-chromosomes. 



Homogamy. — (i) The condition of simultaneous ripening of 

 anthers and stigmas in a flower, (ii) Inbreeding caused by 

 spatial isolation, (iii) The tendency of like to mate with like. 

 Adj. Homogamous. cf. Dichogamy. 



Homogeneon. — A species which is genetically and morpho- 

 logically homogeneous, all members being interfertile (Camp 

 & Gilly). 



Homogenetic Pairing or Association. — Pairing between 

 truly homologous chromosomes, particularly used in allopoly- 

 ploids, of pairing between chromosomes derived from one of 

 the parental species. 



Homogeny. — Similarity as between parts of difterent or- 

 ganisms due to common ancestry. Adj. Homogenous. 



Homogony. — Having the pistils and stamens of all flowers 

 of uniform relative length. 



Homolecithal. — Of eggs : having equally distributed yolk. 



Homologous Chromosomes. — Chromosomes in which the 

 same gene loci occur in the same sequence. 



