Results 21 to 30 of about 936,781 (286)

Partial dosage compensation in Strepsiptera, a sister group of beetles. [PDF]

open access: yes, 2015
Sex chromosomes have evolved independently in many different taxa, and so have mechanisms to compensate for expression differences on sex chromosomes in males and females. Different clades have evolved vastly different ways to achieve dosage compensation,
Bachtrog, Doris, Mahajan, Shivani
core   +2 more sources

Detectable chromosome X mosaicism in males is rarely tolerated in peripheral leukocytes

open access: yesScientific Reports, 2021
Age-related male Y and female X chromosome mosaicism is commonly observed in large population-based studies. To investigate the frequency of male X chromosome mosaicism, we scanned for deviations in chromosome X genotyping array intensity data in a ...
Weiyin Zhou   +5 more
doaj   +1 more source

On a break with the X: the role of repair of double-stranded DNA breaks in X-linked disease [PDF]

open access: yes, 2012
The problem of managing free reactive DNA ends in eukaryotic cells has resulted in the development of a number of mechanisms in order to ensure that free ends are rendered non-reactive, or that the double-strand DNA breaks generating the free ends are ...
Cecceroni, Lucia   +2 more
core   +4 more sources

A case of acute lymphoblastic leukemia with additional chromosomes X and 5 associated with a Philadelphia chromosome in the bone marrow

open access: yesTurkish Journal of Hematology, 2010
We report herein a very rare case of acute lymphoblastic leukemia having a chromosomal constitution of 48,XY,+X,+5,t(9;22)(q34;q11) in the bone marrow.
Burak Durmaz   +5 more
doaj   +3 more sources

Deciphering the Role of the Barr Body in Malignancy: An insight into head and neck cancer

open access: yesSultan Qaboos University Medical Journal, 2018
X chromosome inactivation is the epitome of epigenetic regulation and long non-coding ribonucleic acid function. The differentiation status of cells has been ascribed to X chromosome activity, with two active X chromosomes generally only observed in ...
Deepti Sharma   +4 more
doaj   +1 more source

Large-Scale Analysis of X Inactivation Variations between Primed and Naïve Human Embryonic Stem Cells

open access: yesCells, 2022
X chromosome inactivation is a mammalian dosage compensation mechanism, where one of two X chromosomes is randomly inactivated in female cells. Previous studies have suggested that primed human embryonic stem cells (hESCs) maintain an eroded state of the
Roni Sarel-Gallily, Nissim Benvenisty
doaj   +1 more source

Massive gene amplification on a recently formed Drosophila Y chromosome. [PDF]

open access: yes, 2019
Widespread loss of genes on the Y is considered a hallmark of sex chromosome differentiation. Here we show that the initial stages of Y evolution are driven by massive amplification of distinct classes of genes. The neo-Y chromosome of Drosophila miranda
Bachtrog, Doris   +2 more
core   +1 more source

Dosage Sensing, Threshold Responses, and Epigenetic Memory: A Systems Biology Perspective on Random X‐Chromosome Inactivation

open access: yes, 2020
X‐chromosome inactivation ensures dosage compensation between the sexes in mammals by randomly choosing one out of the two X chromosomes in females for inactivation.
Barr M. L.   +4 more
core   +1 more source

Chromosome assignment of two cloned DNA probes hybridizing predominantly to human sex chromosomes [PDF]

open access: yes, 1984
In situ hybridization experiments were carried out with two clones, YACG 35 and 2.8, which had been selected from two genomic libraries strongly enriched for the human Y chromosome.
A Chapelle de la   +34 more
core   +1 more source

Variation of autosomes and X chromosome STR in breast cancer and gynecological cancer tissues

open access: yesOpen Life Sciences, 2017
This study analyses 1000 cases of patients with breast cancer and 2000 cases of patients with gynecological cancer (1000 cases of malignant tumor, 1000 cases of benign tumors), where breast cancer and malignant tumor patients comprise the observation ...
Hou Youxiang   +2 more
doaj   +1 more source

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