What does zygotic mean?
Zygotic is a technical adjective meaning relating to a zygote, the single cell produced when male and female gametes unite at fertilisation. It is used in biology and genetics for the zygotic stage, zygotic embryos, and genetic changes or processes originating in the fertilized cell. The term distinguishes an event or condition beginning at conception from one arising later in an organism's development or in its body cells. For example, a zygotic mutation is present in the embryo's initial genome, whereas a somatic mutation is acquired later in body cells. In ordinary conversation, “zygotic” would sound highly specialised and usually require biological context. Although less familiar than “embryonic,” it is precise: it points specifically to the zygote and the processes associated with it. Knowing the term helps distinguish conception and inherited genetic variation from later developmental or acquired changes.
adjectiveRelating to or constituting a zygote, the fertilized cell formed by the fusion of two gametes, especially in biological or genetic contexts.
- Relating to a zygote, to fertilization, or to the early developmental stage initiated by the fusion of gametes.
"The zygotic genome becomes active as embryonic development begins."
"The zygotic genome is activated as the newly formed embryo begins development."
"Researchers screened for zygotic mutations that could account for the child's rare disorder."
From the Greek word for “yoke,” zygotic names the biological union of two gametes and everything that follows from it.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of zygotic
The adjective was formed in English from zygote, which ultimately comes from Greek zygōtos, meaning “yoked” or “yoked together.” The Greek word is related to zygon, meaning “yoke,” an apt image for the union of two gametes. English subsequently developed zygotic to describe the zygote and biological processes involving it; related English terms include zygosphere and zygogenesis.
Related word forms
How zygotic is actually used
This is a formal scientific term used chiefly in biology, embryology, and genetics. It is uncommon in everyday speech and has no significant regional distinction between British and US usage.
Easily confused with zygotic
A zygote is the noun for the single cell formed when two gametes fuse, whereas zygotic is the adjective relating to that cell or its processes.