Embryo screening has come a long way over the past few decades and will continue to progress over the next. It is very likely that cloning will talk place of embryo screening and exact “perfect” copies of desired chromosomes could be transplanted in to an embryo.

Here is how cloning has developed over the last few decades:

• 1953: Watson & Crick discover the nature of DNA
• 1968: First cloned tadpole at Oxford, UK
• 1978: Birth of Louise Brown the first 'test tube' baby
• 1995: Megan & Morag the first sheep clones created from a developing embryo
• 1997 (Feb): Dolly the first animal cloned from a single adult sheep cell
• 1997 (July): Polly a sheep with human genes is cloned
• 1998 (July): Mice cloned form other mice clones
• 1998 (Dec): S. Koreans claim to have cloned first human embryo
• 1998 (Dec): UK advisors open the door to legal cloning in UK
• 1999 (June): first pictures released of a 12 day old, human, cloned embryo
• 2000 (July): The Donaldson Report supports the cloning of human embryos for research. Shortly afterwards UK Members of Parliament voted in favour
• 2001 (Jan): 'ANDi', the first genetically modified monkey is born
• 2001 (Feb): The UK House of Lords approve the cloning of human embryos for research
• 2001 (Feb): Scientists unravel the human genome
• 2001 (Nov): Embryo created without fertilization
• 2002 (Dec): An organization called 'Cloneaid' claims that they have produced the first cloned human baby
• 2004 (Feb-Mar): South Koren scientists successfully create 30 human clones for therapeutic reasons. The 30 human embryos are later destroyed.