Follicular factors affecting oocyte maturation and development competence 20.
A cloned embryo is created by cell nuclear transfer from an adult cell into an enucleated oocyte.
All sexually reproducing organisms develop from a single fertilized oocyte by cell multiplication and differentiation.
The first meiotic division is now completed, and the oocyte is now a secondary oocyte, and starts its second meiotic division.
Humans are most commonly infected by swallowing the oocyte form of the parasite in soil (or kitty litter) contaminated by feces from an infected cat; or by swallowing the cyst form of the parasite in raw or undercooked meat.