Yes. All organisms that reproduce sexually, including all animal species, develop from a fertilized egg of some form.
At the womb
The new cells have the exact same genetic information as the fertilized egg. (Study Island)
An egg gets fertilized in the fallopian tube by a sperm, then it goes inside of the uterus, and inside the uterus it develops.
In a human? It develops in the uterus...
uterus
135 days
triplets develop when a single embryo or fertilized egg divides in three..
Animals reproduce sexually, so all animals start life as a zygote or fertilized egg.
Technically, an unfertilized egg is not alive. Since this question is in regard to chickens...the egg itself will develop normally and will be laid by the hen. The unfertilized egg will begin to rot during incubation whereas a fertilized egg will start to develop into a chick.
A sperm or egg alone can not develop into a new individual. Only an egg fertilized by a sperm does.
When the female egg cell met with sperm
A single cell that will develop into a chicken or rooster