Also found in: Dictionary, Thesaurus, Acronyms, Encyclopedia.
1. the process of reproduction.
2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart.
alternate generation reproduction by alternate asexual and sexual means in an animal or plant species.
asexual generation (direct generation) production of a new organism not originating from union of gametes.
first filial generation the first-generation offspring of two parents; symbol F1.
parental generation the generation with which a particular genetic study is begun; symbol P1.
second filial generation all of the offspring produced by two individuals of the first filial generation; symbol F2.
sexual generation production of a new organism from the cell formed by the union of a male gamete (spermatozoon) and a female gamete (oocyte).
spontaneous generation the discredited concept of continuous generation of living organisms from nonliving matter.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
pa·ren·tal gen·er·a·tion (P1),
the parents of a mating, commonly experimental, involving contrasting genotypes; the original mating of a genetic experiment; parents of the F1 generation.
Farlex Partner Medical Dictionary © Farlex 2012
pa·ren·tal gen·er·a·tion(P1) (pă-ren'tăl jen'ĕr-ā'shŭn)
The parents of a mating, commonly experimental, involving contrasting genotypes; the original mating of a genetic experiment; parents of the F1 generation.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
parental generation (P)the members of a cross between PURE BREEDING LINES, giving rise to offspring called the F1.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005