DNA replication - Genes - the units of inheritance (6/10)


Uploaded by OUlearn on 25.07.2008

Transcript:
A double strand of DNA unwinds and the strands separate.
For each unwound strand, the bases can now match
with those that are floating free in the cell.
The familiar base pairing rules apply.
A pairs with T,
G with C,
and so on.
So each strand of the double helix
acts as a template for the formation of a new complementary strand.
This eventually gives two DNA double helices,
each identical to the original
and actually containing one old strand and one new.