Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\25731764
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Cold+Spring+Harb+Perspect+Biol
2015 ; 7
(3
): a019406
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Dosage compensation in mammals
#MMPMID25731764
Brockdorff N
; Turner BM
Cold Spring Harb Perspect Biol
2015[Mar]; 7
(3
): a019406
PMID25731764
show ga
Many organisms show major chromosomal differences between sexes. In mammals,
females have two copies of a large, gene-rich chromosome, the X, whereas males
have one X and a small, gene-poor Y. The imbalance in expression of several
hundred genes is lethal if not dealt with by dosage compensation. The male-female
difference is addressed by silencing of genes on one female X early in
development. However, both males and females now have only one active X
chromosome. This is compensated by twofold up-regulation of genes on the active
X. This complex system continues to provide important insights into mechanisms of
epigenetic regulation.