EVOLUTION
SOURCES OF VARIATION IN A POPULATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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She was grown in an incubator, not the womb of a ewe
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She lived much longer than ordinary sheep
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She had no father
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Her genetic code included pieces of goat DNA
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Detailed explanation-1: -How was Dolly different from virtually all other sheep on Earth? She was grown in an incubator, not the womb of an ewe.
Detailed explanation-2: -Prof. Wilmut, the father of Dolly the Sheep, whose birth at 1996 was a revolutionary success for the scientific world, appeared as an invited speaker at Yeditepe University.
Detailed explanation-3: -Analysis of Dolly’s DNA when she was one year old showed that the protective caps on the end of her chromosomes (known as telomeres) were shorter than those of a normal sheep of the same age. Telomeres get shorter with age and it is possible that Dolly’s telomeres had not been fully renewed during the cloning process.
Detailed explanation-4: -Dolly wasn’t the first animal to be cloned-research on cloning had been going on since the mid-20th century-but she was the first example of successful cloning of a mammal from an adult cell, rather than a more malleable embryo.
Detailed explanation-5: -Dolly remained alive and well long after her birth, with a functional heart, liver, brain, and other organs, all derived genetically from the nuclear DNA of an adult mammary gland cell. The technique used to produce her later became known as somatic cell nuclear transfer (SCNT).