Normal genetic variation

Watch this video to learn about single nucleotide polymorphisms (SNPs), normal variation within the human genome and how we are beginning to understand that SNPs have a key role in disease development and our response to medicines.

Talking point

In this video, we mention that identical twins are not exact genetic copies of each other. New laboratory genetic tests have the ability to correctly discriminate between identical twins.

Yet, identical twins originate from the same fertilised egg with the same genetic material. We will discuss the science behind this riddle in future steps, but please share any thoughts you have as to why this might be.

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