#x-chromosome

[biology-geology-beaches-india]

The Scientific Research Notes of S. Sunkavally. Years: 1986 - 1990.

Page 27.

[biology-geology-beaches-india]

The Scientific Research Notes of S. Sunkavally, Printed Part, Page.131.

Dates unclear, but certainly between 2006-2012.

[biology-geology-beaches-india]

The Science Research Diaries of S. Sunkavally, p425.

[drpedi07]

Aarskog Syndrome

Aarskog syndrome is a rare genetic disorder caused by a mutation of the X-chromosome. This disorder can affect your child’s stature, facial features, genitalia, muscles, and bones.

[lideablog]

Х-хромосома расшифрована! X-chromosome has been decoded!

Х-хромосома расшифрована! X-chromosome has been decoded!

Генетики впервые определили полную последовательность хромосомы человека и создали ее точную виртуальную копию!

О первой полной сборке хромосомы человека «теломер-в-теломер» (то есть от начала и до конца) объявила группа ученых из Национального института исследования генома человека в США. Она смогла закрыть все существующие пробелы и восстановила разрыв в центромере, повторяющемся участке ДНК…

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[chromokin]

Dear my beloved, misled and neglected chromokin sisters, I am here to look after all of you. My page here will be a safe haven for all of your gossiping and plotting of the Y-Chromosome’s downfall. Today, we, the chromokin sisters, will conquer the oppressive stares and bigoted comments of the delusional and privileged white male. No longer shall we toil in the waste of man after they have just finished committing sin to their body. No, my chromokin sisters, we will lead a better future for the variety of the chromosome kin, possibly establishing a Z-chromosome.

Remember, no Y-Chromosomes allowed.

[bpod-bpod]

21 January 2014

X-Changes

The way people’s brains and nervous systems work varies widely – resulting in differences in how each of us think, see, hear and feel – but why is not entirely understood. It’s been known for over 50 years that only one of the two different X-chromosomes in females – one coming from the father and the other from the mother – is active in every cell in the body. But which of the two copies is active varies from cell to cell affecting how different organs, including the brain, work. Now researchers have labelled the two different X-chromosomes red or green in mice, using glowing, genetic ‘tags’, allowing them to see which one is active in every cell. Shown here, the pattern of X activity is very different in the neurons of the left and right sides of the brain, which could explain some of the variation within other mammal species, including humans.

Written by Emma Saxon

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Image courtesy of Jeremy Nathans and colleagues Johns Hopkins University School of Medicine, USA Copyright Elsevier 2014 Research published in Neuron, January 2014

[the-goods]

Do you know where the word "X Factor" came from? It's all about breeding

Horses

The X factor is a gene found on the x-chromosome of horses that causes a larger than average heart, and thus, a trait that could only be pass on via a horse’s daughters.

Just what is it that makes up a champion racehorse? Speed, certainly. Stamina, without a doubt. But, besides conformation, what factors are related to speed and stamina? Good racehorses come in all shapes, and the best built yearling at the sale doesn't always turn out a winner. Mentally, the potential champion needs a number of factors, not the least of which is courage. Willingness to run is at least as important as ability. Physically, one thing a successful horse needs is adequate lung capacity. Another is an efficient heart muscle.

Heart size radically affects the performance ability of the thoroughbred athlete, and it has recently been discovered that the gene which causes an exceptionally large heart is located on the x-chromosome.  Therefore, a colt can only inherit an oversized heart through his dam (mother), and a stallion can only pass on the gene to his daughters. The exact heart size seems to vary from horse to horse. Multiple factors probably contribute to heart size, and the x-factor gene, being a mutation itself, probably works in conjunction with these; it "supersizes" the heart based on the existing blueprint, so to speak.

The most famous such example is Secretariat. His autopsy showed beyond a shadow of a doubt that he had an oversized heart, weighing in at 22 pounds, nearly three times that of the average thoroughbred, and more than three times that of an average non-thoroughbred horse.

Secretariat's stud career wasn't unsuccessful, but while he passed on to his sons many outstanding characteristics, none of them displayed their sire's ability to sprint for a mile and a half, annihilating top notch fields and world records in the process. Essentially, Secretariat had inherited brilliant speed from his sire, the great Bold Ruler, but it was from Somethingroyal (mother) that he inherited the stamina to maintain it for classic distances. A horse tires when oxygen debt makes his muscles ache. A larger, more efficient heart enables those muscles to receive optimum oxygen for a longer period of time, provided that lung capacity is more than adequate. This therefore increases stamina. Secretariat's extreme example of a large heart probably greatly accounts for his seemingly unnatural ability to turn in performances like the 1973 Belmont Stakes.

So, does this mean women have bigger hearts and are more talented and good looking?  LOL