Sentences with phrase «ploidy alteres»

As part of an ongoing functional genomic screening approach, we have been using microarray analysis and next generation sequencing to identify mouse genes that are specifically expressed in meiosis, and are likely involved in aspects of chromosome biology that are required for meiotic ploidy reduction.

We are also investigating the mechanisms controlling cell - to - cell fusion, and how ploidy is controlled in reprogrammed hybrids.

To address key questions of meiotic ploidy reduction, we screen for and characterise novel meiotic proteins, focusing on proteins that are specifically involved in meiotic chromosome segregation and chromosome dynamics in mice.

One pivotal aspect of meiotic chromosome biology and meiotic ploidy reduction is the segregation of homologous chromosomes during the first meiotic division.

9: Aneuploidy and Ploidy in the Endosperm: Dosage, Imprinting, and Maternal Effects on Development

Our lab studies various aspects of chromosome biology ranging from the maintenance of chromosome ends by telomerase to meiosis, hybridization and ploidy.

Christian Som & Heinz - Ulrich Reyer — 2006 (7)([email protected]) Keywords: ecological modelling, evolutionary unit, hybridogenesis, mate choice, ploidy, population dynamics, speciation

In the cnvSegmentsDiploidBeta file, a segment labeled as «invariant» indicates that coverage does not support normal ploidy but the abnormal ploidy is observed to be invariant in both the sequenced genome and the 52 samples that represent the reference genomes for CNV analysis.

Effects of ploidy and sex - locus genotype on gene expression patterns in the fire ant Solenopsis invicta.

Segments labeled «hypervariable» indicate that coverage does not support normal ploidy but coverage is highly variable across the sequenced genome and the 52 reference genomes and is without appreciable clustering.

Christian Jakob, Martina Arioli & Heinz - Ulrich Reyer — 2010 (5)([email protected]) Keywords: dosage effect, gamete production, hybridogenesis, Pelophylax esculentus, ploidy

Ploidy composition in all - hybrid frog populations in relation to ecological conditions.

Variations in the normal ploidy are referred to as aneuploidy (gain or loss of whole chromosomes) and polyploidy (gain of multiple sets of chromosomes).

The team's work highlights this by presenting a comprehensive view of genome evolution on many different levels (e.g., differences in ploidy, aneuploidy, genetic variants, hybridization, and introgressions) that is difficult to obtain at the same scale and accuracy for other eukaryotic organisms.

Changes in the manipulation medium, as well as a move from late to early stages after first appearance of pronuclei, produced blastocysts which were statistically indistinguishable from those produced in normal IVF by measures of morphology, ploidy and gene expression.

They further noted that those with a diploid state appeared to have an advantage over other ploidy types.

They noted also that the number of chromosome sets (ploidy) in the yeast cells had an impact on fitness across all of those species tested.

«We show that diploids adapt more slowly than haploids, that ploidy alteres the spectrum of beneficial mutations, and that the prevalence of homozygous mutations depends on their genomic position,» says Marad.

Understanding the influence of ploidy on evolution is only possible through experimental evolution organisms such as yeast.

Lang says a key takeaway from the paper is that ploidy, which varies considerably in the natural world, has a significant effect on how genomes can and will evolve.

Although domesticated isolates exhibit high variation in ploidy, aneuploidy and genome content, genome evolution in wild isolates is mainly driven by the accumulation of single nucleotide polymorphisms.

Organisms differ in ploidy, or how many copies of the genome they carry in their cells.

«Collectively, this work fills a gap in our understanding of how ploidy impacts adaptation, and provides empirical support for the hypothesis that diploid populations have altered access to beneficial mutations,» says Marad.

A Hidden Markov Model Approach for Simultaneously Estimating Local Ancestry and Admixture Time Using Next Generation Sequence Data in Samples of Arbitrary Ploidy Corbett - Detig, R., R. Nielsen.

A Hidden Markov Model Approach for Simultaneously Estimating Local Ancestry and Admixture Time Using Next Generation Sequence Data in Samples of Arbitrary Ploidy.

This process involves ploidy changes (1n → 2n → 1n) via self cell — cell fusion or endoreplication, meiosis, and sporulation to produce haploid meiotic progeny.

This was an important advance because it allowed us to separate the effects of ploidy from the effects of genes that change ploidy.

Indeed, triploidy is the most efficient ploidy level for the agronomic performance in banana.

The analysis of the ploidy of minichromosomes in cells that are released from arrest demonstrates that the sister molecules are properly segregated when the cell cycle block is removed.

Not only can yeast undergo as many as ten generations in a 24 - hour period, it can also be stably maintained at different ploidies.