Phenotype

phenotype (n.) "observable characteristics of an individual," 1911, from German phaenotypus (Wilhelm Johannsen, 1909); see pheno- + type (n.). [Etymonline.]
The phenotype (from Greek phainein, meaning 'to show', and typos, meaning 'type') of an organism is the composite of the organism's observable characteristics or traits. The term covers the organism's morphology or physical form and structure, its developmental processes, its biochemical and physiological properties, its behavior, and the products of behavior. An organism's phenotype results from two basic factors: the expression of an organism's genetic code, or its genotype, and the influence of environmental factors.
J. D. Watson's Molecular Biology of the Gene "We refer to the appearance (physical structure) of an individual as its phenotype, and to its genetic composition as its genotype.'4 Monroe Strickberger in a standard textbook, Genetics, is somewhat more elaborate. "In their broad definitions," he writes: the phenotype refers to all the manifold biological appearances, including chemical, structural and behavioral attributes, that we can observe about an organism but excludes its genetic constitution. The genotype defines only the particular genetic material that an organism inherits from its parents. Therefore. although the phenotype changes with time as the appearance of the organism changes, the genotype remains relatively constant except for the rare genetic changes known as mutations. 
[Churchill 1974]
== Rhizomata ==
* Morphology; Biomorphology; Racial morphology; Faciality; The phenomenological; 
* Facial expression; Facial caricature; Facial characteristics; 
* Facial recognition; Facial identification; Phenomenon; 
* Ethnic phenotype; Racial phenotype; Class phenotype; Physical anthropology; 
* Craniometry; Faciometry; 
* Facial communication; Facial masking; Facial phenotype; Ethnic faciality; Racial faciality
Category:Biology
Category:Genetics