00:01
Dna replication, a, begins when two molecules join together to exchange segments.
00:08
B, uses each strand of dna molecule as a template for a new strand.
00:13
C, results in formation of four new strands, or d, occurs through the addition of nucleotides to the end of the parental dna molecule.
00:22
So it's not, a, first of all.
00:25
That's called recombination.
00:27
It's something that happens in meiosis.
00:30
Recombination or crossing over in meiosis one.
00:35
And that doesn't give us new dna, it just exchanges parts of existing dna.
00:40
So let's look at a molecule of dna.
00:44
It has two strands, and these two strands are linked together.
00:49
And we want to replicate it.
00:50
So replication is to get an exact copy...