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    • Pair of young identical twin boys leaning on a wall.
    Rights: Image licensed through 123rf.com Published 28 June 2011 Size: 62 KB Referencing Hub media

    Identical or monozygotic twins occur when a single egg is fertilised to form 1 zygote that divides into 2 separate embryos. As a result, identical twins share identical DNA but may show differences in their phenotype due to environmental factors.

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      Twins

      Twins are 2 offspring born from the same pregnancy. It is estimated that twins make up about 2% of the world’s population. In recent times, however, there has been an increase in the incidence of ...

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      2. ARTICLE

      Genotype and phenotype

      We are all unique. Even monozygotic twins, who are genetically identical, always have some variation in the way they look and act. This uniqueness is a result of the interaction between our ...

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