Other pages in this set

Page 2

Preview of page 2

Here's a taster:

What is selective breeding?
Selective breeding is the process in which the best animals or plants are chosen
and are bred together. Then the best animals are chosen in their offspring (F1).
These are then bred again to give F2 generation. This carries on many generations
until a perfect animal is found that has the best characteristics and traits that are
Improving the quality of milk from cattle
This can be improved using cows with a higher yield.…read more

Page 3

Preview of page 3

Here's a taster:

Clones are animals and plants that are genetically identical. For example identical
twins and triplets are natural clones because they have the same genes
There is also artificial cloning- Dolly the sheep was the first cloned mammal in
1996 and since then using the same techniques, lots of mammals have been
produced. This is an example from animals.…read more

Page 4

Preview of page 4

Here's a taster:

The embryo is then
placed inside a surrogate mother and develops inside the surrogate.
The Roslin Technique
The Roslin Technique is a variation of somatic cell nuclear transfer that was
developed by researchers at the Roslin Institute. The researchers used this method
to create Dolly.
In this process, somatic cells (with nuclei in tact) are allowed to grow and divide
and are then deprived of nutrients to induce the cells into a suspended or dormant
stage.…read more

Page 5

Preview of page 5

Here's a taster:

The ability to clone genetically modified animals. These animals could include
cows that produce milk with no lactose, which would help people who are allergic
to lactose.
Gene therapy treats diseases and disorders by modifying a person's genome.
An advantage of the technique is to give someone that is born with a genetic
disease or who develops cancer the chance at a normal life.
You can `silence' a gene.…read more

Page 6

Preview of page 6

Here's a taster:

Ethical and legal problems - Many believe that this is an invasion of privacy. They
believe that if prenatal tests are performed that these could lead to an increase in
the number of abortions.
Religious concerns - Religious groups and creationists may consider the alteration
of an individual's genes as tampering or corrupting God's work.
In 1989, researchers discovered CFTR, the gene that causes cystic fibrosis (CF).…read more


No comments have yet been made

Similar Biology resources:

See all Biology resources »See all resources »