Sentences with phrase «of the fertilized egg contains»
The DNA in the nucleus of the fertilized egg contains all the instructions needed to make all the different proteins and all the different sorts of structures in all the different sorts of cells in the body.
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A fertilized human egg cell does not contain a homunculus, but neither is it a structureless drop of viscous liquid.
Francis Crick, the Nobel laureate and biophysicist, is quoted as having estimated that «the amount of information contained in the chromosomes of a single fertilized human egg is equivalent to about a thousand printed volumes of books, each as large as a volume of the Encyclopedia Britannica.»
They made these clones by a process called automatic parthenogenesis: The egg is formed normally (with half the species» usual number of chromosomes), then fertilized by the «polar body,» a cell that is created during oogenesis and contains the same gene copies as the egg, resulting in the shark having half the genetic variation of its mother.
Once the transfer was complete, the recipient eggs contained a complete set of genes, just as they would if they had been fertilized by sperm.
For some reason their eggs contain the same 44 chromosomes as their body cells — 22 from the mother and 22 from the father — instead of half, and so the eggs can grow into gecko hatchlings without first being fertilized by sperm.
The fertilized eggs, donated by 87 patients, were unsuitable for implantation as part of in vitro fertility therapy, because they contained an extra set of chromosomes.
Once the wasp's egg is fertilized, the compartments that contain each set of chromosomes (called the pronuclear envelopes) move to a special location in the egg, then break down, allowing the chromosomes to escape.