The transition from mature oocyte to developing embryo requires a coordinated series of events, collectively known as egg activation. Egg activation includ... VL Horner,MF Wolfner - 《Developmental Dynamics》 被引量: 320发表: 2008年 Protein synthesis and the cell cycle: centrosome reproduction in ...
1 Female sheep A provides an egg cell.2 The nucleus is removed from the egg cell.3 The egg cell is ready for a new nucleus.4 Female sheep B provides a somatic cell for the clone.The nucleus of this cell contains all the genes needed to produce a new sheep....
This useful feature of egg cells has also led to experimental cloning. The nucleus of the egg can be removed and replaced with the nucleus of a somatic (body) cell. This will prompt the egg to begin dividing as it would after fertilization, producing an embryo with the exact genetic combin...
Sex determination is an essential step in the commitment of a germ cell to a sperm or egg. However, the intrinsic factors that determine the sexual fate of vertebrate germ cells are unknown. Here, we show that foxl3, which is expressed in germ cells but not somatic cells in the gonad, ...
题目emale sheep A provides an egg cell 2 The nucleus is removed from the egg cell 3 The egg cell is ready for a new nucleus 4 Female sheep B provides a somatic cell for the clone. The nucleus of this cell contains all the genes needed to produce a new sheep 5 The nucleus is ...
2. The nucleus is removed from the egg cell. 3. The egg cell is ready for a new nucleus. 4. Female sheep B provides a somatic cell for the clone. The nucleus of this cell contains all the genes needed to produce a new sheep. 5. The nucleus is taken out of the somatic cell. 6...
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In mammals, these gametes are the sperm and egg that eventually fuse to form the developing zygote. In yeast, meiosis is coupled to the process of sporulation, whereby the four haploid nuclei are retained within the confines of a single cell known as the ascus. The resultant spores that ...
1. Female sheep A provides an egg cell. 2. The nucleus is removed from the egg cell. 3. The egg cell is ready for a new nucleus. 4. Female sheep B provides a somatic cell for the clone. The nucleus of this cell contains all the genes needed to produce a new sheep. ...
The migration of border cells during is a simple and powerful system for studying invasive in vivo. Border cells are somatic cells that delaminate from the follicular epithelium of an egg chamber and invade the germ line cluster. They migrate between the nurse cells to reach the oocyte, using ...