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DOLLY HAD BLOOD PROBLEMS.
VARIOUS ORGANS FAILED.
>> WERE HER FAULTS AS A LIVING
CREATURE, ALL OF THE HEALTH
PROBLEMS THAT SHE DID HAVE,
WAS THAT DUE TO HER BEING A
CLONE? AND IT'S PROBABLY
SAFE TO SAY YES.
>> NATURE. ONE ***, ONE EGG.
THE RESULT--AN INDIVIDUAL WITH
EQUAL PARTS DNA FROM A MOTHER
AND A FATHER, AND THE ONLY WAY
HIGHER LIFE FORMS CAN REPRODUCE.
UNTIL NOW.
>> UNDER NORMAL CONDITIONS, THE
*** AND THE EGG UNITE AND THEY
YIELD WHAT WE CALL A ZYGOTE.
>> BUT NORMAL CONDITIONS HAVE
NOTHING TO DO WITH CLONING.
>> WE TAKE A SKIN CELL AND WE
PUT IT IN AN EGG THAT WE
REMOVED THE NUCLEUS OF THAT EGG.
SO, THAT EGG IS JUST LIKE
A CHICKEN EGG WHERE YOU REMOVE
THE EGG YOLK AND YOU ONLY HAVE
THE WHITE, AND PUT IT IN THAT
EGG AND THEN STIMULATE IT
CHEMICALLY AND ELECTRICALLY
AND ACTIVATING THAT EGG TO
BECOME AN EMBRYO.
>> IN THE YEARS SINCE DOLLY,
OTHER SPECIES SOON JOINED
THE CLONING CLUB.
THE SCIENCE IS DEADLY SERIOUS,
BUT SOME SEEM TO TAKE IT
FAR TOO LIGHTLY.
>> IN 2009, A GENETICS
LABORATORY HELD A CONTEST TO
CLONE THE WORLD'S PERFECT DOG.
>> WELL, WHO ARE THE BEST DOGS?
ON ONE CASE, THE BEST DOG WAS A
DOG NAMED TRACKER, A GERMAN
SHEPHERD WHO WAS LITERALLY A
9/11 RESCUE DOG.
>> TRACKER THE DOG DIED AT 16
YEARS OLD, BUT THE 5 CLONES WERE
BORN AND ARE HEALTHY. ALTHOUGH
THEY'RE STILL ALIVE, WE HAVE NO
IDEA WHAT THEIR FATE IS.
>> IN 2012, THE INTERNATIONAL
EQUESTRIAN FEDERATION LIFTED A
BAN ON THE CLONING OF DRESSAGE
HORSES.
>> THAT MEANS WITHIN A
GENERATION, EVERY HORSE IN THE
OLYMPICS COULD BE A CLONE OF A
SINGLE CHAMPION.
>> AS SCIENTISTS PERFECT THE ART
OF THE EXACT REPLICA, THEIR NEXT
STEP IS BOTH LOGICAL AND
TERRIFYING--MODIFYING THE COPY.
>> ONCE YOU DEVELOP THAT, THE
NEXT QUESTION IS CAN YOU MODIFY
THAT ORGANISM IN SPECIFIC WAYS
BY ADDING A GENE?
>> BIZARRE AND, SOME SAY,
DANGEROUS CHANGES ARE
INTRODUCED.
>> WHAT IF THE GENE YOU ADD
IS A GENE FROM A PHOSPHORESCENT
JELLYFISH? WHAT IF YOU COULD
TAKE THAT GENE AND IMPLANT IT
INTO A MOUSE? YOU THEN GET
A GLOWING MOUSE.
>> OPPONENTS OF GENETIC
MODIFICATION AND CLONING FEAR
THE WORST--GOATS CROSSED WITH
SPIDERS. SPARE PARTS GROWN ON
LAB RATS. COWS THAT GIVE HUMAN
BREAST MILK.
>> BECAUSE IF SCIENTISTS CAN
MANIPULATE CERTAIN KINDS OF
GENES, THINK OF WHERE THEY CAN
GO WITH THIS.
>> FOR THE RIGHT PRICE, MANY
DOCTORS WILL NOW REPLICATE YOUR
FAVORITE FAMILY PET.
BUT SHOULD THEY?
>> SOME PEOPLE WILL SPEND ALL
KINDS OF MONEY TO EXTEND THE
LIFE OF THEIR PET, BUT WITH EACH
GENERATION OF CLONE, YOU
INTRODUCE MORE CHANCE FOR
CATASTROPHIC FAILURE.
>> ARE TODAY'S SCIENTISTS
RISKING THE FUTURE OF MANKIND
IN A DANGEROUS ATTEMPT TO
PLAY GOD? WHEN WE RETURN, MEET
THE ONE DOCTOR WHO DARES TO TELL