Sentences with phrase «during meiosis»

Indeed, mating between individuals with different karyotypes frequently produces hybrids with a reduced fertility (or sterile) due to mis - segregation of chromosomes during meiosis.

Recombination during meiosis results from programmed DNA breakage, subsequent DNA repair, and the formation of crossovers — a specific DNA repair product that exchanges DNA between parental chromosomes.

After three years of experiments, IRB Barcelona postdoctoral researchers Petra Mikolcevic and Michitaka Isoda describe the molecular imbalances that occur during meiosis as a result of the absence of this protein.

Diversity results from the re-assortment of genes during meiosis and genetic mutation.

«We know that CEP63 depletion leads to problems during meiosis, a specialized type of cell division that is required for male germ cells to produce sperm,» explains Stracker.

To understand his hypothesis, consider that during the formation of a woman's eggs, paternal and maternal X chromosomes recombine during meiosis.

They tagged the poison protein green and the antidote protein red, and imaged the cells during meiosis.

The results of the research team revealed the ovules keep track of time during meiosis using a process similar to a molecular «alarm clock.»

Errors in how chromosomes segregate to gametes during meiosis are the root cause of some miscarriages and conditions such as Down's syndrome.

As eggs and sperm, or gametes, are formed during meiosis, chromosomes carrying the genetic material from each parent must find their partners, pair, and exchange parts of their DNA.

For decades, scientists have been aware that genetic elements seemed to engage in competition during meiosis, as some were transmitted to the gametes at a rate consistently higher than chance would dictate.

Paulo Navarro - Costa, first co-author of this study and researcher at the IGC explains: «Similarly to humans, fruit fly ovules also have a resting period during meiosis — the specialized cell division required for the formation of healthy reproductive cells.

The researchers genetically engineered the worm so that PP4 was functionally disabled, and then observed the consequences of its absence on chromosome regulation during meiosis.

Recombination refers to the formation of new combinations of genes naturally during meiosis, which is a stage of the cell cycle where chromosomes pair up and undergo exchange.

Prior studies by Kerr el al, showed that PP2ACdc55 played an essential role in controlling the timing of metaphase to anaphase during meiosis, in other words preventing cells from prematurely exiting meiosis.

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.

In the S. cerevisiae genome, as in the human genome, tandem repeated minisatellite DNA sequences are unstable during meiosis when they may undergo expansion and / or contraction of the number of tandem repeats.

Adam Kupinski (Eckmann, MPG)-- «The Ste20 kinease GCK - 3 is essential for C. elegans development and regulates centrosome maturation during meiosis» (2008)

Recombination occurs during meiosis, a special kind of cell division that takes place only in the testicles and ovaries.

More than a century ago using electron microscopy, scientists have identified a unique, ladder - like structure, the synaptonemal complex, which assembles between homologous chromosomes during meiosis.

The daughter, in turn, could pass on only a broken - up and remixed version to the fourth generation, due, again, to the recombination that occurs during meiosis.

During meiosis, each copy is transmitted to the gametes in equal numbers.

During meiosis, each set of homologous chromosomes pair up in a kind of chromosomal square dance, chromosome 1 with chromosome 1, 2 with 2, and so on down the line.

During meiosis, the cell copies all its chromosomes, pairs them up, and shuffles sections of genetic material between the arms of the paired or homologous chromosomes.

Because the chromosomes of each parent undergo genetic recombination during meiosis, each gamete, and thus each zygote, will have a unique genetic blueprint encoded in its DNA.

During meiosis, the genome of a diploid germ cell, which is composed of long segments of DNA packaged into chromosomes, undergoes DNA replication followed by two rounds of division, resulting in haploid cells called gametes.

During meiosis, telomeres allow chromosomes to attach to the nuclear membrane, thus allowing them to exchange DNA fragments.

Appropriate dynamics and behavior of chromosomes during meiosis are essential to genetic integrity and reproductive success.

Two proteins she discovered help ensure proper partitioning of chromosomes during meiosis (improper partitioning is a major cause of human birth defects).

During meiosis, homologous chromosomes, one from the mother and the other one from the father, pair with each other and exchange parts (recombine).

Discovered two proteins crucial for proper partitioning of chromosomes during meiosis (improper partitioning is a major cause of human birth defects)