a variant spelling of Pliocene
[plahy-uh-tak-see] /ˈplaɪ əˌtæk si/ noun, Botany. 1. an increase in the normal number of parts.
[plahy-o-truh-pee] /plaɪˈɒ trə pi/ noun, Genetics. 1. the phenomenon of one gene being responsible for or affecting more than one phenotypic characteristic. n. 1921, from German pleiotrop (1910), from Greek pleion “greater in quantity, the more part, very many,” (see pleio-) + trope “turn, turning” (see trope). Related: Pleiotropic; pleiotropism.
- Pleiotropic gene
pleiotropic gene n. A gene that causes a number of distinct but seemingly unrelated phenotypic effects. Also called polyphenic gene.
/plaɪˈɒtrəˌpɪzəm/ noun 1. (genetics) the condition of a gene of affecting more than one characteristic of the phenotype pleiotropism plei·ot·ro·pism (plī-ŏt’rə-pĭz’əm) or plei·ot·ro·py (-pē) n. The control by a single gene of several distinct and seemingly unrelated phenotypic effects. plei’o·trop’ic (plī’ə-trŏp’ĭk, -trō’pĭk) adj.