Sentences with phrase «during egg and sperm»

While cosmic rays are thought to be one source of mutations, DNA - copying errors during egg and sperm production may be a more common cause.

Not exact matches

«How does (sic) the sperm and egg meet during sexual intercourse and can conception be prevented?»

Uterus: The female reproductive organ (See Womb) which is pear - shaped, hollow, where the egg and sperm meet, the baby grows during pregnancy.

So much happens during pregnancy that it's basic definition — the period of time when a human being grows from the combination of genetic material from a single egg and sperm — seems almost too simplistic when you say it aloud.

Look for great descriptions of what to expect during testing and treatment, as well as more than 350 interesting images of eggs, sperm, and embryos.

Timing ovulation can be an effective method to get pregnant more quickly, because right before, and during ovulation, a woman's body is most fertile for conception: the cervical fluid aiding the sperm mobility to swim more quickly towards the fallopian tube to fertilize the egg.

Because of this limitation, researchers have theorized that inherited methylation, also referred to as parental imprinting, largely remains stable throughout development, except during two important developmental milestones: after fertilization and during the creation of sperm and egg cells.

Even after the principles of epigenetics came to light, it was believed that methylation marks and other epigenetic changes to a parent's DNA were lost during the process of cell division that generates eggs and sperm and that only the gene sequence remained.

Thawing caused ice crystals to form and prevented meiosis, the cellular process during which an egg's chromosomes split up from 46 to 23, to be united later with 23 chromosomes from a sperm cell.

Online searches related to sperm, egg and blood donations increase during recessions, and researchers suggest that search statistics may even help predict national trends in donation rates (Canadian Journal of Urology, vol 22, p 7923).

And the changes are handed down: While most of the chimp genome's 24 pairs of chromosomes undergo a genetic reshuffling during the production of sperm and eggs, with genes swapped between the two copies, there is only one Y chromosome and thus no mixing — the Y is transmitted intaAnd the changes are handed down: While most of the chimp genome's 24 pairs of chromosomes undergo a genetic reshuffling during the production of sperm and eggs, with genes swapped between the two copies, there is only one Y chromosome and thus no mixing — the Y is transmitted intaand eggs, with genes swapped between the two copies, there is only one Y chromosome and thus no mixing — the Y is transmitted intaand thus no mixing — the Y is transmitted intact.

During the formation of eggs and sperm, the cell's chromosomes must pair up and part in an elaborate sequence that results in sex cells with exactly half the number of chromosomes as the parent cell.

Most corals reproduce by releasing sperm and eggs into the ocean during brief annual spawning events.

In a similar way to how they work in other cells, epigenetic markers push PGCs to their fate during embryonic development, but PGCs are unique because when they develop into sperm and eggs, the epigenetic markers are erased.

In sperm and eggs, these double sets are halved to produce single, «haploid» ones, which unite during fertilization.

An international team of researchers from Japan and the UK has discovered how a single protein, called PP4, oversees the processing of DNA during sperm and egg generation for successful fertilization.

During breeding, the newts are very active and release a lot eggs, sperm and DNA into the water.

The process begins when a gene for a molecule with a potentially toxic function, like a protein - chopping enzyme, is accidentally duplicated, typically during the formation of egg cells and sperm.

During this process, the synergid cell dies and degenerates, and the sperm cells migrate to the egg and central cell.

In other frogs, females usually lay eggs during the male - female embrace (amplexus) and males simultaneously release sperms that fertilize the eggs during this process.

Something seemed to have gone terribly wrong during meiosis, the process that separates chromosomes so that when egg and sperm come together they each contribute half the genetic material to an embryo.

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.

During sperm development, energy - producing mitochondria clump and elongate down the tail and fuel the frantic race to the egg.

Retrotransposons are normally silenced to prevent harmful mutations from occurring in egg and sperm cells, but are mobilized during certain stages of brain development, when neurons are being produced from dividing stem cells.

The mistakes often happen during an exchange of genetic material between the partners of each pair of chromosomes, known as crossing over, which occurs in the cells of the testes and ovaries destined to become sperm or eggs.

Soon after the egg and sperm join during fertilization, the resultant zygote (fertilized egg cell) starts undergoing cell division.

Errors in this recombination process during the production of sperm or egg cells underlie a variety of chromosomal abnormalities and can cause deletions of regions of the genome, miscarriage, or genetic disorders such as Down syndrome.

The AUGMENT treatment isolates mitochondria from your EggPC cells and, together with the sperm, these are added to your egg to supplement the existing mitochondria during IVF.

De novo mutations are so called because they are generated during the formation of eggs and sperm, they can be passed to offspring but are not seen in the parents.

Sperm cells can not divide and have a limited life span, but after fusion with egg cells during fertilization, a totipotent zygote is formed with the potential to develop into a new organism.

During IVF, mature eggs are collected (retrieved) from a woman's ovaries and fertilised by sperm in a laboratory.

«No one from the outside would dream that we went through infertility and had to do IVF and ICSI [a procedure in which during IVF, sperm is injected directly into the egg] to get pregnant before I turned 30.

During this crucial time, both men and women's bodies are extremely sensitive to nutritional deficiencies and exposure to toxins — so much so that if the quality of the egg and sperm are low enough you may not be able to conceive.

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».

This has actually even been shown to be true of environmental stress on BOTH male and female parents during the creation of the individual sperm and egg cells.

During a spawning event, female and male fish rise in the water as groups, releasing millions of eggs and sperm.

During your menstrual cycle, there are certain days when it's possible for sperm to fertilize an egg and cause a pregnancy — these are your fertile days.

If your egg doesn't meet up with sperm, or a fertilized egg doesn't implant in your uterus, the thick lining of your uterus isn't needed and it leaves your body during your period.