Sentences with phrase «normal egg and sperm»

To the researchers» surprise, however, the animals missing one or both copies of Mus81 were fertile and produced normal egg and sperm cells.

Not exact matches

After the woman's eggs have been retrieved through the normal IVF protocol and are ready for fertilization, the mitochondria taken from her stem cells are injected into an egg along with a sperm cell.

You need three things: 1) health eggs, 2) healthy sperm, and 3) a normal reproductive tract, for pregnancy to happen.

But the whiptails» egg cells first double their chromosomes twice and then divide twice, leaving them with the normal number of chromosomes and rendering a sperm cell unnecessary.

Using the refrigerated sperm, the researchers were able to fertilize an egg in vitro and produce a normal mouse pup.

Still unclear is whether the resulting eggs, which reached maturity in just 22 days, compared with 5 months in the body, are normal and whether they can combine with sperm to make a healthy embryo.

One of the expected dangers of cloning is that worn down telomeres will be inherited from the adult cells used in lieu of an egg or sperm cell, and indeed the telomeres of adult clones are often shorter than normal.

However, during normal fertilization, when an egg and a sperm fuse, the sperm's mitochondria are destroyed, as the embryo inherits only its mother's mitochondria.

After an egg has been fertilized by a sperm, normal embryos follow clear - cut timeframes for development, such as the time it takes for a two - cell embryo to turn into a three - cell embryo, and the time it takes for a three - cell embryo to turn into a four - cell embryo.

This way the sperm can then carry the mutation and fertilise a normal egg to carry on the knocked - out genome on to the next generation.

These genes likely came from the gametes — the eggs or sperm — and can be used to predict whether an embryo is chromosomally normal or abnormal at the earliest stage of human development.

While not enough sperm could be collected to carry out normal in vitro fertilization, in which sperm and eggs are simply mixed together, a procedure known as assisted fertilization was successful.

It supports normal egg development in a woman's ovary and interestingly, it also helps in increasing the sperm count in men.

Any normal person would automatically assume that aside from mixing a cocktail of sperm and egg in a fertility clinic, if a woman were to become impregnated by a specific man, she must have had sex with him.

This was attributed to «recombination» taking place between the marker and the actual gene during the formation of gametes (sperm and eggs), resulting in the marker normally associated with the mutant gene and that associated with the normal gene being «switched over».