When embryo originates from unfertilized egg, is known as

When an embryo originates from an unfertilized egg, is known as Parthenogenesis.
It is a natural form of asexual reproduction in which the growth and development of embryos occur in a gamete (egg or sperm) without combining with another gamete.
In plants, parthenogenesis is a component process of apomixis. In algae, parthenogenesis can mean the development of an embryo from either an individual sperm or an individual egg.