Knight — 4 — Dictionary 



Allantoin. — A substance which stimulates cell growth; it 

 occurs naturally in the allantoic fluid of mammals, in the urine 

 of sucking calves, etc. and in comfrey roots and it can readily 

 be synthesised. cf. Traumatin. 



Allautogamia. — The state of having a facultative method 

 of pollination in addition to a normal method. 



Allele. — An allelomorph, q.v. 



Allelic. — Allelomorphic (see Allelelomorph). 



Allelism. — Allelomorphism, q.v. 



Allelomorph — (i) One of a pair of characters which are 

 alternative to each other in inheritance being governed by 

 genes situated at the same locus in homologous chromosomes, 

 (ii) One of a pair, or series, of genes which are alternative 

 to each other in inheritance because they are situated at the 

 same locus in homologous chromosomes. Adj. Allelomorphic. 



Allelomorphism. — A relationship between two factors such 

 that they are of necessity separated into sister gametes in 

 germ cell formation (see Allelomorph). 



Allen's Rule. — In warm-blooded species, the relative size of 

 exposed portions of the body (limbs, tail and ears) decreases 

 with decrease of mean temperature (Huxley). 



Anesthetic Characters. — Allaesthetic characters, q.v. 



Allccarpy. — The production of fruit following cross-fertiliza- 

 tion. 



Allochronic Species. — Species which do not belong to the 

 same time level, as opposed to contemporary, or synchronic, 

 species (cf. Mayr, 1942). 



Allochthonous. — Acquired, extraneous, exotic. Opp. Auto- 

 chthonous. 



Allogamous. — Reproducing by cross-fertilization. 



Allogamy. — Cross-fertilization. Opp. Autogamy. 



Allogene. — Pearson's term for a recessive allele, as opposed 

 to protogene. 



Allogenous Flora. — Relic plants of an earlier prevailing 

 flora and environment; epibiotic plants (Cain, 1944). 



Alloheteroploid. — A heteroploid' resulting from the combina- 

 tion of specifically distinct genoms, or chromosomes from such 

 genoms. cf. Autoheteroploid. 



Alloiobiogenesis. — An alternation of a sexual with an asexual 

 form, or, cytologically, the alternation of a haploid with a 

 diploid stage; alternation of generations. 



Alloiogenesis. — Alloiobiogenesis, q.v. 



