(2) Making animal clones using embryo transplants and stem cells

Farming uses many new methods thanks to advances in 'biotechnology' e.g.

Farmers can produce cloned offspring from their prize bulls and cows using embryonic transplants.

Sperm cells are removed from a prize bull and egg cells taken from a prize cow.

The sperm are used to artificially inseminate (artificially fertilise) the egg cells.

The embryo that develops can be split many times to form clones - but before any stem cells become specialised.

The cloned embryos can be then implanted into cows.

The embryos can then grow and develop in the normal natural way to produce lots of genetically identical baby calves.

'Theoretically', hundreds of ideal offspring can be derived every year from just one best bull and cow parents.

---

Key points and extended summary of important ideas

Based on the syllabus-specifications for students taking the AQA, Edexcel and OCR GCSE level biology examinations (~US grades 9-10).

Animal Cloning: Embryo Transplants and Stem Cells

Cloning in animals can be achieved using embryo transplants and stem cells, each with distinct procedures and applications.

---

1. Embryo Transplants

Embryo transplant cloning is commonly used in livestock breeding to produce genetically identical animals with desirable traits, such as high milk yield or disease resistance.

Procedure:

1. Selection of Parent Animals – A desirable male and female are selected for breeding.

2. Fertilization – The sperm and egg cells fuse to create an embryo.

3. Early Embryo Development – The embryo is allowed to divide several times but is stopped before cells begin differentiating.

4. Embryo Splitting – The developing embryo is split into multiple genetically identical embryos.

5. Transplantation – These identical embryos are implanted into multiple surrogate mothers.

6. Birth of Cloned Offspring – The surrogate mothers give birth to genetically identical offspring.

Uses of Embryo Transplants:

• Livestock improvement: Ensuring consistent quality in farm animals.

• Conservation: Increasing populations of endangered species.

• Scientific research: Studying genetic influences on disease.

---

2. Cloning Using Stem Cells

Stem cell technology allows scientists to produce clones from adult cells rather than embryos, through techniques such as somatic cell nuclear transfer (SCNT).

Procedure (SCNT):

1. Cell Collection – A somatic (body) cell is taken from the animal to be cloned.

2. Enucleation – The nucleus of an unfertilized egg is removed, leaving an empty egg cell.

3. Nuclear Transfer – The nucleus from the somatic cell is inserted into the empty egg.

4. Cell Stimulation – An electric shock or chemical treatment stimulates the egg to start dividing.

5. Embryo Development – The resulting embryo is implanted into a surrogate mother.

6. Birth of the Clone – The offspring is genetically identical to the donor animal.

Uses of Stem Cell Cloning:

• Preserving rare breeds or endangered species.

• Medical research, such as cloning animals for drug testing.

• Regenerative medicine, potentially producing patient-specific cells for treatment.

---

Both cloning methods have advantages, but ethical concerns exist around genetic diversity reduction, animal welfare, and potential risks in cloned populations.

---

Summary of learning objectives and key words or phrases

Know the procedure for making animal clones and be able to describe the use of embryo transplants and the medical uses of cloned stem cells.

---

WHAT NEXT?

TOP OF PAGE

Index of biology notes on cloning

INDEX of all my BIOLOGY NOTES

HOME PAGE of Doc Brown's Science website

UK KS3 Science Quizzes for KS3 science students aged ~11-14, ~US grades 6, 7 and 8

Biology * Chemistry * Physics UK GCSE level students aged ~14-16, ~US grades 9-10

Advanced Level Chemistry for pre-university age ~16-18 ~US grades 11-12, K12 Honors

Find your GCSE/IGCSE science course for more help links to all science revision notes

email doc brown - comments - query?

---

Doc Brown's school biology revision notes: GCSE biology, IGCSE  biology, O level biology,  ~US biology science grade 8, grade 9 and grade 10 school science courses or equivalent for ~14-16 year old students of biology IGCSE AQA GCSE Biology Edexcel GCSE Biology IGCSE OCR Gateway Science Biology OCR 21st Century Science Biology  Some of these biology revision notes might be suitable for UK KS3 Science-Biology courses for ages 12-14 (~US biology science grades 6, grade 7 and grade 8), Explaining the importance of making animal clones with embryo transplants & cloned stem cells in GCSE level biology, What you need to know about making animal clones with embryo transplants & cloned stem cells for GCSE level biology, Explaining the use of making animal clones with embryo transplants & cloned stem cells knowledge in GCSE level biology, Examples of making animal clones with embryo transplants & cloned stem cells explained when studying GCSE level biology, What is the significance of making animal clones with embryo transplants & cloned stem cells in GCSE level biology, describing and explaining the theory of making animal clones with embryo transplants & cloned stem cells when studying GCSE level biology, revision notes for making animal clones with embryo transplants & cloned stem cells in exams, online help for understanding making animal clones with embryo transplants & cloned stem cells for GCSE biology, exam revision notes for making animal clones with embryo transplants & cloned stem cells, what do I need to learn about making animal clones with embryo transplants & cloned stem cells? revision summary for making animal clones with embryo transplants & cloned stem cells in GCSE biology exams, learning notes for making animal clones with embryo transplants & cloned stem cells, help to pass the making animal clones with embryo transplants & cloned stem cells topic in an exam question, how to prepare for questions on making animal clones with embryo transplants & cloned stem cells in a GCSE biology examination? Based on the syllabus-specifications for students taking the IGCSE/GCSE level biology examinations summary revision notes and key points on making animal clones with embryo transplants & cloned stem cells for students studying the AQA igcse/gcse biology notes on making animal clones with embryo transplants & cloned stem cells, Edexcel gcse biology notes on making animal clones with embryo transplants & cloned stem cells,  OCR 21st century GCSE biology notes on making animal clones with embryo transplants & cloned stem cells, OCR gateway GCSE biology notes on making animal clones with embryo transplants & cloned stem cells, WJEC gcse biology notes on making animal clones with embryo transplants & cloned stem cells, CCEA gcse biology notes on making animal clones with embryo transplants & cloned stem cells for students taking & studying CIE Cambridge igcse biology, or any other GCSE or IGCSE level biology exams notes on making animal clones with embryo transplants & cloned stem cells, useful for US grade 9-10 students taking biology courses

---

SITEMAP Website content © Dr Phil Brown 2000+. All copyrights reserved on Doc Brown's biology revision notes, images, quizzes, worksheets etc. Copying of website material is NOT permitted. Exam revision summaries and references to science course specifications are unofficial.