Gap Fill - Identical Twins - Level 6


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   cell      development      difference      each      fertilized      geneticists      pairs      perfect      study      susceptibility  

Paragraph 1

A new shows that while identical twins can look perfectly alike, it is not a similarity. They are not clones of other. Scientists at the University of Iceland analyzed the DNA from 387 of identical twins - babies born from a single egg. The scientists compared the DNA with that of the twins' parents and children. The looked for mutations in the early stages of . A mutation is a tiny change in the sequence of the DNA that can occur when a divides. This change causes a slight in the DNA replication process. A single, tiny change can create differences in height, intelligence, eye colour and even in to disease.

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