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Veritasium
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These resources have been reviewed and selected by STEM Learning’s team of education specialists for factual accuracy and relevance to teaching STEM subjects in UK schools.
Why women are stripey
This video explains the structure of DNA and the role of histones and methyl groups in deactivating one of the X chromosomes in a female. The deactivation of one X chromosome is random. As mitosis reproduces cells, they may contain the X chromosome inherited from the father or the mother. This can’t be seen in humans, yet in some animals it can as a trait is carried on the X chromosome and this affects the phenotype.
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