Chapter 9 Frontiers of Biotechnology - SchoolWorld

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14 Δεκ 2012 (πριν από 5 χρόνια και 23 μέρες)

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Chapter 9

Frontiers of Biotechnology

(mother) (child 1) (child 2) (father)

Aka…
DNA
Technology

DNA Technologies

1.
Restriction Enzymes

2.
DNA Fingerprinting

3.
Genetic Engineering

4.
PCR

1. Restriction Enzymes


Restriction enzymes cut DNA.


Restriction enzymes act as

molecular scissors.”


cut DNA at a specific nucleotide
sequence called a restriction site

1. Restriction Enzymes


Different restriction enzymes cut DNA
in different ways. Each enzyme has a
different restriction site

1. Restriction Enzymes


2. DNA Fingerprinting


A DNA
Fingerprint shows
the lengths of
DNA fragments
between
restriction sites.


banding pattern
on a gel is a DNA
fingerprint

2. DNA Fingerprinting

(mother) (child 1) (child 2) (father)

3. Genetic Engineering


New genes can be added to an
organism’s DNA.

3. Genetic Engineering


Genetic engineering involves changing
an organism’s DNA to give it new traits.


3. Genetic Engineering


Genetic engineering is based on the use
of
Recombinant DNA.



Recombinant DNA

contains genes
from more than one
organism.

(bacterial DNA)

(bacterial DNA)

4. PCR