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Polyploid in Medical News

MUHC in the spotlight at the 14th World Congress on In Vitro Fertilization

... in the ovary - Asangla Ao - Monday 17.09.2007 at 4:30pm Morphologically good and poor quality human blastocyst contain different proportions of polyploid cells - Jacquetta Trasler - Monday 17.09.2007 at 5:00pm Epigenetic modification during oocyte growth and maturation Ultrasound technolo...
Polyploid in Biological News

Plants grow bigger and more vigorously through changes in their internal clocks

...naturally polyploid. Until now, the molecular mechanisms for hybrid and polyploid vigor have largely been unknown. "Before this discovery, no one really k...n the early 1900s. All corn in the U.S. is hybrid. Many of the important polyploid crops, such as wheat and cotton, are known as allopolyploids, because they ...

A special issue of the International Journal of Plant Sciences

...ating systems. In the course of their study, they find that the costs of selfing in polyploids are likely to be dynamic, changing with the age of the polyploid and history of mating. As a collection, this special issue of the International Journal of Plant Sciences forms an essential volume for anyone in...
Polyploid in Biological Definition

Chromosome

... species have somatic cells (body cells), which are diploid [2n] (they have two sets of chromosomes, one from the mother, one from the father) or polyploid [Xn] (more than two sets of chromosomes), and gametes (reproductive cells) which are haploid [n] (they have only one set of chromosomes). Gametes...

Ploidy

...et of chromosomes, the term monoploid can be used interchangably with haploid. Plants and other algae switch between a haploid and a diploid or polyploid state, with one of the stages emphasized over the other. This is called alternation of generations . Most diploid organisms produce haploid sex cel...

Gene

...cies carry more than one copy of their genome within each of their somatic cells . These organisms are called diploid if they have two copies, or polyploid if they have more than two copies. In such organisms, the copies are practically never identical. With respect to each gene, the copies that an indi...

Gene duplication

...erwent duplication only ~1,000,000 years ago. Plants are the most prolific genome duplicators. Wheat for example is hexaploid (a specific term for a polyploid organism) meaning it has six duplicate copies of its genome. The two genes that exists after a gene duplication event are paralogs. Paralogs usuall...

Ploidy

...et of chromosomes, the term monoploid can be used interchangably with haploid. Plants and other algae switch between a haploid and a diploid or polyploid state, with one of the stages emphasized over the other. This is called alternation of generations . Most diploid organisms produce haploid sex cel...

Hardy-Weinberg principle

...olyploidy The Hardy–Weinberg principle may also be generalized to polyploid systems, that is to populations which have more than two copies of each ch... is the binomial expansion of: ( p + q ) 2 and therefore the polyploid case is the binomial expansion of: ( p + q ) c where c is ...

Heterozygote

... Heterozygote cells are diploid or polyploid and have different alleles at a locus (position) on homologous chromosomes . When an organism is referred to as a heterozygote, or being hete...

Homozygote

... Homozygote cells are diploid or polyploid and have the same alleles at a locus (position) on homologous chromosomes . When an organism is referred to as being homozygous for a specif...

Locus

...position of a gene (or other significant sequence) on a chromosome . A locus can be occupied by any of the alleles of the gene. Diploid or polyploid cells are either homozygous (have the same allele at a locus) or heterozygous (have different alleles at a locus). In mathematics , a lo...
Polyploid in Biological Dictionary

Polyploid

Polyploid animals are often sterile, so they often reproduce by parthenogenesis. Polyploid lizards are also quite common and parthenogenetic. ... polyploid ( ) adj. Having one or more extra sets of chromosomes: a polyploid species; a polyploid cell ... In addition to polyploi...

Polytene

... Card Required. Minireview about polytene chromosomes in Phaseolus ... Polytene chromosomes represent a special structural organization of polyploid ... Documentation about the polytene chromosomes of Phaseolus coccineus ... Different segments of the polytene chromosomes resulted in a d...

Macronucleus

...er type of nucleus in ciliates. Macronuclei are polyploid and undergo direct division without mitosis. It...cleus (mak′rō no̵̅o̅′klē əs) noun ... a large, polyploid macronucleus that contains the active genes tha...er, with some ... The macronucleus is highly polyploid (~800n in P. tetraurelia), divides ... During se...

Interkinesis

.... 4 Karyokinesis. 5 Photokinesis. 6 See also [edit] Cytokinesis ... [edit] Interkinesis . A pause between two phases of meiosis. ... Very rarely, polyploid mutants ... Between telophase I and interkinesis , about ... interkinesis nuclei were certainly unbalanced with regard to both chromo ... The...

Homozygote

...r condition, an individual who has inherited ... An organism that has two identical alleles of a gene. ... Homozygote cells are diploid or polyploid and have the same alleles at a locus ... When an organism is referred to as being homozygous for a specific gene, it ... ... alleles at a ...

Heterozygote

...lopedia entries, essays, summaries, research ... Asymmetric Model of Heterozygote Advantage at Major ... Heterozygote cells are diploid or polyploid and have different alleles at a ... human is referred to as a heterozygote , or being heterozygous for a specific ... Zoology information, ...

Diploid

...oid Cells that contain homologous chromosomes. ... cell fuses with the egg cell and gives rise to a diploid embryo The other sperm ... polyploid organisms contain two or more sets of chromosomes. ... Diploid gametes are frequently formed in this way. When a diploid gamete fuses with a ...
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