prézigótico

The term *prézigótico* (from the French *pré-* meaning "pre-" and *zigótico*, derived from the Greek *zigotos*, meaning "yoked" or "paired") refers to a stage in the evolutionary development of certain biological structures or processes that occurs before the formation of a fully functional zygote, the fertilized egg cell. This concept is primarily used in evolutionary biology and developmental biology to describe traits or mechanisms that emerge prior to the establishment of a zygotic genome, often during early embryonic development or in reproductive strategies.

In some organisms, particularly those with complex life cycles, such as certain plants, fungi, or invertebrates, reproductive structures or behaviors may evolve before the zygote itself forms. These *prézigotic* adaptations can include specialized cells, tissues, or physiological processes that facilitate fertilization or early embryonic development. For example, in some algae or protozoa, structures like gametangia (reproductive organs) or mating types may develop independently of the zygote, serving as precursors to reproductive success.

The study of *prézigotic* traits is relevant to understanding the origins of sexual reproduction and the evolution of reproductive strategies. By examining these early stages, researchers can infer how genetic and environmental factors interact to shape reproductive biology. This field also intersects with evolutionary theory, particularly in discussions about the transition from asexual to sexual reproduction and the selective advantages of early reproductive adaptations.

While the term is not widely used in mainstream biological literature, it appears in specialized discussions on developmental genetics and evolutionary developmental biology (evoldevo). Its application helps clarify the temporal and functional distinctions between pre-zygotic and post-zygotic processes in reproduction and development.