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B1: Genes, chromosomes and DNA

  • inside every cell in your body is a nucleus. your nucleus contains your genetic material.
  • your genetic material is arranged into chromosomes, and there are 23 pairs of chromosomes in your body.
  • a gene is a short length of DNA, each gene is an instruction for a certain protein to be produced (structural/functional) chromosome, showing gene as section of DNA (

the sex cells are different, there are 23 SINGLE chromosomes instead of 23 pairs, so when a woman releases an egg…


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