Sentences with word «unfertilized»

This native South African bee reproduces through a specific type of parthenogenesis known as thelytoky, in which diploid females (which carry the normal double set of chromosomes) develop from unfertilized eggs.

Schöler says the clusters are likely parthenotes, embryos that develop from unfertilized eggs.

For instance, certain fish species produce no males, but the females must have sex to trigger parthenogenic development of unfertilized eggs; the female therefore «mates» with males of other species.

Dolly was cloned using the technique of «somatic cell nuclear transfer,» when a nucleus from an adult cell is transferred into unfertilized egg that has had its nucleus removed, and is then shocked with electricity to start cell growth.

The mothers provide their spiderlings with unfertilized «nurse» eggs to eat.

Adult female New Mexico whiptails reproduce solely through parthenogenesis, laying unfertilized eggs that develop into other female whiptails.

An effective queen will lay whatever the hive requires; with fertilized eggs producing female offspring and unfertilized ones producing drones.

Belmonte's work is on unfertilized eggs; human eggs with such modified mitochondria could one day be used in in vitro fertilization (IVF) procedures to prevent a woman's offspring from inheriting mitochondrial disease.

The marbled crayfish is the only decapod crustacean that reproduces asexually, with the all - female species making clones of itself from eggs unfertilized by sperm.

Angelo Spena, a biologist at the University of Verona in Italy, with collaborators from Italy and Germany, found a way to get around the seed problem entirely by engineering plants that produced fruit, even when unfertilized.

Stem cells created from unfertilized mice eggs are successfully transplanted without immune rejection

By growing some locusts in cages on plots with fertilized grass and others on unfertilized grass akin to what they get in grazed areas, the researchers found the insects likely did best in the grazed areas.

Of the remaining 11 females, two did not produce any eggs, two produced unfertilized eggs with no sperm present on the perivitelline layer and seven produced eggs that had been reached by sperm from one male only.

Eggs laid at temperatures under 19.5 °C remain unfertilized, and as a consequence those first produced in the spring, when the nest temperatures are between 13 ° and 19.5 °C, are male.

Gassmann used unfertilized frog eggs to test and analyze genes found in the grapevine plants.

Anyone reading this - PLEASE think about that and use alternatives or go to a local farmer or a friend who has chickens that they just use for unfertilized eggs!

Our laboratory staff performs a reliable, state - of - the - art technique called vitrification to freeze unfertilized eggs that can be fertilized at a later time.

After an observation of pathogenesis in a hammerhead shark in captivity (which sadly didn't survive), researchers at the Belle Isle Aquarium of the Detroit Zoological Institute decided to try to hatch the seemingly unfertilized eggs their white spotted bamboo sharks would leave around the tank.

While freezing sperm and embryos has been standard practice for years, the ability to freeze and then successfully thaw unfertilized eggs has all but eluded specialists.

Wilmut and his co-workers accomplished their feat by transferring the nuclei from various types of sheep cells into unfertilized sheep eggs from which the natural nuclei had been removed by microsurgery.

Mitochondrial transfer technology to shuffle genetic material between unfertilized eggs could help reduce the risk of childhood diseases

The donated mitochondria are placed within unfertilized eggs, which can then be fertilized so that women can give birth to genetically related, disease - free children.

Cloning researchers had thought that only unfertilized eggs were capable of reprogramming adult DNA.

Similarly, nitrogen uptake by rice, wheat and maize (corn) on long - term unfertilized farmland had increased by about 16 % in the same period.

Collecting unfertilized eggs has proved challenging, Eggan says, because donors are not compensated beyond the cost of the extraction procedure.

This year, a team led by the Hebrew University of Jerusalem finally produced haploid human embryonic stem cells by forcing unfertilized egg cells to divide.

To make the discovery, the scientists set up 31 artificial ant colonies with an unhatched queen and a set of sterile female worker ants and watched for the emergence of unfertilized male and fertilized female pupae.

Keirstead will use a technique called somatic cell nuclear transfer (SCNT) in which a patient's DNA is transplanted into a donated unfertilized egg cell in order to generate stem cell lines with the same genetic makeup of the patient.

Short answer from that, apparently a study from the early years of converting the Amazon to beef cattle: deforestation converting forest to unmanaged, unfertilized grassland loses carbon storage; conversion to managed, fertilized grassland increases carbon storage — compared to the original forest on the site.

Although supermarket eggs are typically unfertilized, fertile eggs are available.

They told Science they suspected she ate unfertilized or damaged eggs.

In a second approach, a group of researchers successfully cloned mice from fertilized embryos instead of unfertilized eggs.

The modified cell nuclei were then inserted into unfertilized eggs to create engineered pig embryos, which were implanted in a normal sow.

Because turtles can lay unfertilized eggs, no one will know if George has sired offspring until mid-November, when the eggs should hatch if fertile.

I've read in a few places (none totally reliable) that fertilized eggs have a lower avidin content than unfertilized ones.

Unfertilized mouse eggs can be prompted to divide in the lab, but the resulting embryos can't make a placenta and thus die in the womb well before birth.

Judged by its carbon footprint, wool may be more benign: Sheep graze freely on unfertilized grass, although their digestion of vegetation produces methane, which is a potent greenhouse gas.

If she remains unfertilized, she will stay in diestrus for 60 — 90 days.

There is a species of reptile (like an alligator) that is entirely female because they hatch from unfertilized eggs and can not cross breed with other types of gators.

If my heart remains unsoftened and unfertilized by grace, the good seed may germinate for a season, but it must ultimately wither, for it can not flourish on a rocky, unbroken, unsanctified heart.

The ads were provocative on purpose (in one, a broken egg symbolized an unfertilized egg during menstruation) and called inappropriate by the approving agency.

One of the ads shows a photo of a cracked egg, an allusion to the unfertilized eggs expelled during menstruation.

Unlike the controversial method of tissue harvesting that requires some human embryos to be destroyed, the new cloning technique can use a patient's own skin cells — combined with an unfertilized human egg — to create tissue with a DNA match.

But the same is true of every unfertilized egg in the body of a nun» (CSPM 21, 42).

But the same is true of every unfertilized egg in the body of a nun.

Unshaded coffee tree grown with fertilizer yield the most Kona, although unfertilized shaded crops generally yield more than unfertilized unshaded crops: the response to fertilizer is much greater in full sun.

It's best to have sex during this timeframe when the unfertilized egg has about a 24 - hour window to become fertilized by the sperm.