Gap Fill - Identical Twins - Level 5


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   alike      cell      each      early      easily      mutation      sequence      single      slight      study  

Paragraph 1

A shows that while identical twins can look , they are not clones of other. Scientists analyzed the DNA from 387 pairs of identical twins. These are people born from a fertilized egg. The scientists looked for mutations in the stages of development. A is a tiny change in the of the DNA. This can occur when a divides. This change causes a difference in the DNA when it duplicates. A tiny change can create differences in height, intelligence, eye colour and even in how someone can catch a disease.

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