Recombination at the Molecular Level
III
The two DNA molecules
are now covalently linked in an "X"-like cross configuration,
called a heteroduplex. As the chromosomes are
pulled away from each other during meiosis, each double-stranded structure
unravels so that the point of linkage "migrates" towards one
end of the molecule. [Imagine that the centromere is to the left: pulling the A and a
ends away from each other causes the branch to move in the direction of the B-locus markers].
All text material
© 2005 by Steven M. Carr