geno-, gen-, genit-, gener-, -gen

(Greek > Latin: race, kind; line of descent; origin, creation; pertaining to sexual relations, reproduction, or heredity; and more recently, a gene or genes)

ontogeny, ontogenetic, ontogenetically
1. The course of development of an individual organism.
2. The history or science of the development of the individual being; embryology.
Ontogeny diagram of progress.

  1. Ontogeny: development of an individual from the moment the egg is fertilized up till adulthood.
  2. Opaque area: non-transparent part.
  3. Pellucid area: transparent part.
  4. Neural fold: fold related to the head.
  5. Neural tube: extension related to the head.
  6. Heart: blood-pumping organ.
  7. Somites: metameres.
  8. Omphalomesenteric arteries: vitelline duct.
  9. Wing buds: beginning of the formation of the wings.
  10. Limb buds: beginning of the formation of the legs.
—Info Visual.Info
oogenesis
oogenetic
oogenous
oophorogenous
opsigenes
1. Structures formed or becoming functional long after birth.
2. Late born, used especially of third molar teeth.
organogenesis, organogeny, organogenetic
The formation and development of animal or plant organs that takes place during the development of an embryo.
orogenesis
The folding, faulting, and uplift of the earth's crust to form mountain ranges; often accompanied by volcanic and seismic activity.
orogenetic
A reference to the process of mountain formations; especially, by the folding of the areas of the earth's crust.
orthogenesis
1. a biological principle that the evolution of an animal species is in a given direction, governed by intrinsic factors, and independent of external factors.
2. The doctrine that the phylogenetic evolution of organisms takes place systematically in a definite direction and not accidentally in many directions; variation is predetermined by the germ plasm.
orthoroentgenography
A technique for producing radiographs showing the exact sizes of organs or bones by using a narrow beam of x-rays perpendicular to the plate or film.
osteogenesis
otogenous
Referring to the something originating within the ear; especially, an inflammation of the ear.
ovigenesis
ovigenetic