Letter G

Gene, zygotic lethal

A gene that is lethal (fatal) for the zygote, the cell formed by the union of a sperm (male sex cell) and an ovum (female sex cell).

The zygote would normally develop into an embryo, as instructed by the genetic material within the unified cell.

However, a zygotic lethal gene scotches prenatal development at its earliest point.

A zygotic lethal gene is a mutated (changed) version of a normal gene essential to the survival of the zygote.

The extent of the mutation can range from a change in a single base in the DNA to deletion (loss) of the entire gene.

Medical disclaimer

The information on this page is for educational and informational purposes only and does not constitute medical advice in any way.

It does not replace the advice of a physician, pharmacist or other healthcare professional.
It does not represent a prescription of drugs, diagnostic exams or therapies.
In case of symptoms, doubts or concerns about your health, always consult a qualified physician.

In case of emergency call 911 (US) or 112 (EU).