Fertilized in Biological Definition

Infertility

... (IVF) in which eggs are removed from the woman, fertilized and then placed in the woman's uterus, bypassing ... sperm is injected directly into an egg; the fertilized egg is then placed in the woman's uterus as in ... (ZIFT) in which eggs are removed from the woman, fertilized and then placed in the woman's fallopian tubes ...

Twin

... Fraternal twins (commonly known as "non-identical twins") occur when two fertilized eggs are implanted in the uterine wall at about the same time, within the ... Identical twins Identical twins occur when a single egg is fertilized to form one zygote ( monozygotic ) but the zygote then divides into two ...

Apoptosis

... out by Thibert and her colleagues has begun to clarify some of the fundamental aspects of morphogenesis , or the development of organisms from fertilized eggs to fully-developed animals and plants. It has also suggested specific answers to why normal cells carry out apopotosis when they end up outside ...

Blastula

... The blastula is an early stage of embryonic development in animals . It is produced by cleavage of a fertilized ovum and consisting of a spherical layer of cells surrounding a fluid-filled cavity. The blastula follows the morula and precedes the gastrula ...

Bacterium

... Bacteria capable of digesting the hydrocarbons in petroleum are often used to clean up oil spills . Some beaches in Prince William Sound were fertilized in an attempt to facilitate the growth of such bacteria after the infamous 1989 Exxon Valdez oil spill . These efforts were effective on beaches ...

Ploidy

... commonly, the male is haploid and the female is diploid. In such species, the male develops from unfertilized eggs, while the female develops from fertilized eggs: the sperm provides a second set of chromosomes when it fertilizes the egg. Haplodiploidy is found in many species of insects from the family ...

Embryo

... it is called a seedling . Animals : The embryo of vertebrates is defined as the stages between the first division of the zygote (a fertilized ovum ) until it becomes a foetus . An embryo is called a foetus at a more advanced stage of development and up until birth or hatching. In ...

Morphogenesis

... that code for these differentially localized oocyte mRNAs are called maternal effect genes . They have profound effects on the development of a fertilized egg, but they are expressed by cells within the maternal ovary. Bicoid and hunchback are the maternal effect genes that are most important for ...

Bacterium

... Bacteria capable of digesting the hydrocarbons in petroleum are often used to clean up oil spills . Some beaches in Prince William Sound were fertilized in an attempt to facilitate the growth of such bacteria after the infamous 1989 Exxon Valdez oil spill . These efforts were effective on beaches ...

Gene

... they encode, genes govern the cells in which they reside. In multicellular organisms they control the development of the individual from the fertilized egg and the day-to-day functions of the cells that make up tissues and organs . The instrumental roles of their protein products range from ...

Ploidy

... commonly, the male is haploid and the female is diploid. In such species, the male develops from unfertilized eggs, while the female develops from fertilized eggs: the sperm provides a second set of chromosomes when it fertilizes the egg. Haplodiploidy is found in many species of insects from the family ...

Human

... mannaz . Biology A human skeleton Birth and death The life of the individual begins at conception . An egg is usually fertilized inside the female by the male through sexual intercourse , though in vitro fertilization methods are also used. The developing individual is ...

Morphogenesis

... that code for these differentially localized oocyte mRNAs are called maternal effect genes . They have profound effects on the development of a fertilized egg, but they are expressed by cells within the maternal ovary. Bicoid and hunchback are the maternal effect genes that are most important for ...

Signal transduction

... Such mass activations are often referred to as " genetic programs ," one example being the sequence of events that take place when an egg is fertilized by a sperm . Types of signals Extracellular Signal transduction usually involves the binding of "extracellular" signaling molecules to ...