Sentences with phrase «sperm cell nucleus»

The second part of this process is the fusion of the polar nuclei with a second sperm cell nucleus, thus forming a primary endosperm.

Not exact matches

Is it when the sperm cell has begun to enter the egg cell, but before the nucleus of the sperm cell is «inside» the egg cell?

At an early stage of this process, BRDT enters the nucleus and switches on relevant parts of the genome that instruct the cell to mature into a sperm cell.

At an early stage of this process, BRDT enters the cell nucleus and switches on the parts of the genome that instruct the cell to mature into a sperm cell.

The method, called somatic cell nuclear transfer (SCNT), replaces the DNA in an egg cell's nucleus with the genetic material from the nucleus of a skin cell, then tricks the egg cell to start dividing as if it had been fertilized with sperm.

In the first cell cycle after fertilization the maternal genome inherited from the oocyte (egg) and the paternal genome provided by sperm exist as separate nuclei in the zygote.

The mutation — believed to occur in the father's sperm before conception — results in the production of a toxic protein that attaches to and distorts the nucleus (the cell's command center containing its genetic material).

Albertini's group now suggests not only that these outside cells tell the egg where to locate the polar body — and, therefore, the nucleus and spindle — but also that their plumbing lines soften up the egg cell's rind in the opposite, or vegetal pole, to increase the odds that sperm will penetrate the hemisphere opposite the nucleus.

These are caused when an egg cell lacking a nucleus is fertilised by a sperm cell.

Luiz Da Silva and colleagues from the University of California at Berkeley has already succeeded in using the Livermore laser to observe 50 - nanometre features in the nuclei of dried rat sperm cells (Science, vol 258, p 269).

The sperm lack the green glow, Okabe has found, because the protein is expressed in the cell cytoplasm, and sperm are little more than nucleus and tail.

If a male totally lacks sperm or the testicular cells that make it, a nucleus from one of his body cells could be inserted into an egg from his mate that had had its nucleus removed.

The researchers then injected the nucleus of an egg from a second macaque, fertilized the cell with sperm, and implanted it in the second monkey's womb.

SCNT is a technique wherein the nucleus from a somatic cell (an adult cell that is not a sperm or egg, i.e. not the gametes) is implanted into an enucleated egg cell which can then be implanted into, and develop in, a surrogate mother, and potentially become an adult organism.

SCNT is a technique wherein the nucleus from a somatic cell (an adult cell that is not a sperm or an egg) is implanted into an enucleated egg which can be implanted into, and develop, in a surrogate mother, and potentially become an adult organism.