Encyclopedia of Biology

G

G

G

G

G

G

G

T T T T T T T T

T

T

T

T

T

T

A

A

A

A

A

A

A

A

A

A

A

A

A

A

A

C C C C C C C

C

C

C

C

C

G

G

G

T

T

T

A

A

A

C

C

C

G

G

T A

C

C

G

T

T

A

A

C G

T

A T

C

new strand new strand

The process by which the DNA double helix unwinds and makes an exact copy of itself.(Courtesy of Darryl Leja, NHGRI, National
Institutes of Health)