chromosome repair leading to expression of recessive genes?
- From: melody_ann_ryan@xxxxxxxxx
- Date: Thu, 1 Sep 2005 23:30:31 -0400 (EDT)
I was reading this article talking about the future of the Y chromosome
and this paragraph interested me:
http://www.npr.org/templates/story/story.php?storyId=4225769
"All the other chromosomes come in two copies. Every time a cell
divides, mistakes in genes can creep in. In paired chromosomes, that
means that if there is a mistake on one chromosome, a cell can always
get the correct gene sequence from the other chromosome."
Sorry if I am making a big misunderstanding, but it sounds to me that
when a gene on a chromosome is damaged, the chromosome will just repair
it with the gene on the other half of the chromosome. If there was a
gene pair where the dominant gene was damaged, would the cell (and all
of its offspring) then express the recessive gene? That could lead to
some wierd results if it happened early in development. Am I off base?
.
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